Conversationalretrievalqa. In this article we will walk through step-by-step a coded example of creating a simple conversational document retrieval agent using LangChain, the pre-eminent package for developing large language… Hello everyone. Conversationalretrievalqa

 
 In this article we will walk through step-by-step a coded example of creating a simple conversational document retrieval agent using LangChain, the pre-eminent package for developing large language… Hello everyoneConversationalretrievalqa  CoQA paper

<br>Experienced in developing secure web applications and conducting comprehensive security audits. The returned container can contain any Streamlit element, including charts, tables, text, and more. Conversational Retrieval Agents. We have always relied on different models for different tasks in machine learning. when I ask "which was my l. Enthusiastic and skilled software professional proficient in ASP. Structured data is presented in a standardized format. Use our Embeddings endpoint to make document embeddings for each section. You signed in with another tab or window. 📄How to build a chat application with multiple PDFs 💹Using 3 quarters $FLNG's earnings report as data 🛠️Achieved with @FlowiseAI's no-code visual builder. py","path":"langchain/chains/qa_with_sources/__init. Open comment sort options. “🦜🔗LangChain &lt;&gt; Gradio Custom QA Over Docs New repo showing how to use the new @Gradio chatbot release to create an application to chat with your docs Crucially, does NOT use ConversationalRetrievalQA chain but rather only individual components to show how to customize 🧵”The pipelines are a great and easy way to use models for inference. Augmented Generation simply means adding external information to the input prompt fed into the LLM, thereby augmenting the generated response. In ConversationalRetrievalQA, one retrieval step is done ahead of time. {"payload":{"allShortcutsEnabled":false,"fileTree":{"langchain/chains/qa_with_sources":{"items":[{"name":"__init__. memory = ConversationBufferMemory(. You can go to Copilot's settings and turn on "Debug mode" at the bottom for more console messages!,dporrnlqjirudprylhwrzdwfk wrjhwkhuzlwkpidplo :rxog xsuhihuwrwud qhz dfwlrqprylh dvodvwwlph" (pp wklvwlph,zdqwrqh wkdw,fdqzdwfkzlwkp fkloguhqSearch ACM Digital Library. 5-turbo-16k') Then, we'll use one of the most useful chains in LangChain, the Retrieval Q+A chain, which is used for question answering over a vector database (vector store or index, as it’s also known). When I chat with the bot, it kind of. Or at least I was not able to create a tool with ConversationalRetrievalQA. I wanted to let you know that we are marking this issue as stale. RAG with Agents This is an agent specifically optimized for doing retrieval when necessary and also holding a conversation. You signed out in another tab or window. How to say retrieval. A ContextualCompressionRetriever which wraps another Retriever along with a DocumentCompressor and automatically compresses the retrieved documents of the base Retriever. 这个示例展示了在索引上进行问答的过程。. At Google I/O 2023, we Vertex AI PaLM 2 foundation models for Text and Embeddings moving to GA and foundation models to new modalities - Codey for code, Imagen for images and Chirp for speech - and new ways to leverage and tune models. Gone are the days when we needed separate models for classification, named entity recognition (NER), question-answering (QA. js and OpenAI Functions. However, every time I send a new message, I always have to wait for about 30 seconds before receiving a reply. chain = load_qa_chain (OpenAI (), chain_type="stuff",verbose=True) Debugging chains. I am trying to make a simple QA chatbot which is able to remember the past conversation and answer question about previous messages. from langchain_benchmarks import clone_public_dataset, registry. #2 Prompt Templates for GPT 3. I couldn't find any related artic. Unstructured data can be loaded from many sources. I need a URL. Flowise offers a straightforward installation process and a user-friendly interface, making it suitable for conversational AI and data processing applications. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. When a user asks a question, turn it into a. c 2020 Association for Computational Linguistics 960 We present a new dataset for learning to identify follow-up questions, namely LIF. Example code for accomplishing common tasks with the LangChain Expression Language (LCEL). Welcome to the integration guide for Pinecone and LangChain. Now you know four ways to do question answering with LLMs in LangChain. 0. ConversationalRetrievalQA chain 是建立在 RetrievalQAChain 之上,提供聊天历史记录的组件。 它首先将聊天记录(显式传入或从提供的内存中检索)和问题组合成一个独立的问题,然后从检索器中查找相关文档,最后将这些文档和问题传递到问答链以返回一. Hybrid Conversational Bot based on both neural retrieval and neural generative mechanism with TTS. invoke("What is the powerhouse of the cell?"); "The powerhouse of the cell is the mitochondria. You can add your custom prompt with the combine_docs_chain_kwargs parameter: combine_docs_chain_kwargs= {"prompt": prompt} You can change your code. The Memory class does exactly that. You can also choose instead for the chain that does summarization to be a StuffDocumentsChain, or a RefineDocumentsChain. Provide details and share your research! But avoid. Reference issue: logancyang#98 When opening an issue, please include relevant console logs. chains. EDIT: My original tool definition doesn't work anymore as of 0. You signed in with another tab or window. You can use Question Answering (QA) models to automate the response to frequently asked questions by using a knowledge base (documents) as context. You can also use Langchain to build a complete QA bot, including context search and serving. A simple example of using a context-augmented prompt with Langchain is as. Generative retrieval (GR) has become a highly active area of information retrieval (IR) that has witnessed significant growth recently. . sidebar. This example showcases question answering over an index. In this step, we will take advantage of the existing templates in the Marketplace. We address the conversational QA task by decomposing it into question rewriting and question answering subtasks. "Chain conversational_retrieval_chain expects multiple inputs, cannot use 'run'" To Reproduce Steps to reproduce the behavior: Follo. Limit your prompt within the border of the document or use the default prompt which works same way. 0. Hi, @DennisPeeters!I'm Dosu, and I'm here to help the LangChain team manage their backlog. Those are some cool sources, so lots to play around with once you have these basics set up. Prepending the retrieved documents to the input text, without modifying the model. This video goes through. The above sample datasets consist of Human-Bot Conversations, Chatbot Training Dataset, Conversational AI Datasets, Physician Dictation Dataset, Physician Clinical Notes, Medical Conversation Dataset, Medical Transcription Dataset, Doctor-Patient Conversational. The user interacts through a “chat. registry. NET Core, MVC, C#, and Python. Use the chat history and the new question to create a "standalone question". Stream all output from a runnable, as reported to the callback system. Pinecone enables developers to build scalable, real-time recommendation and search systems. #3 LLM Chains using GPT 3. This makes structured data readily processable by computers. I also added my own prompt. For example, there are DocumentLoaders that can be used to convert pdfs, word docs, text files, CSVs, Reddit, Twitter, Discord sources, and much more, into a list of Document's which the LangChain chains are then able to work. ) Now we’re ready to create a chatbot that uses the products’ data (stored in Redis) to inform conversations. chains import ConversationalRetrievalChain 3 4 model = ChatOpenAI (model='gpt-3. Compared to the traditional “index-retrieve-then-rank” pipeline, the GR paradigm aims to consolidate all information within a. ConversationalRetrievalQA does not work as an input tool for agents. [Updated on 2020-11-12: add an example on closed-book factual QA using OpenAI API (beta). But what I really want is to be able to save and load that ConversationBufferMemory () so that it's persistent between sessions. Example const model = new ChatAnthropic( {}); 8 You can pass your prompt in ConversationalRetrievalChain. vectorstores import Chroma db = Chroma (embedding_function=OpenAIEmbeddings ()) texts = [ """. To add elements to the returned container, you can use with notation. Chat and Question-Answering (QA) over data are popular LLM use-cases. Set up a question-and-answer chain with ConversationalRetrievalQA - a chatbot that does a retrieval step to start - is one of our most popular chains. py","path":"libs/langchain/langchain. See Diagram: After successfully. from langchain. 1. csv. 266', so maybe install that instead of '0. , SQL) Code (e. Thanks for the reply and the explanation, it's more clear for me how the , I'm trying to build and API endpoint capable of receive a question and give a response based on some . Prompt Engineering and LLMs with Langchain. I found this helpful thread for the RetrievalQAWithSourcesChain library in python, but does anyone know if it's possible to add a custom prompt template for. We deal with all types of Data Licensing be it text, audio, video, or image. . {"payload":{"allShortcutsEnabled":false,"fileTree":{"langchain/chains/qa_with_sources":{"items":[{"name":"__init__. 9,. I am using text documents as external knowledge provider via TextLoader In order to remember the chat I using ConversationalRetrievalChain with list of chatsColab: [Chat Agents that can manage their memory is a big advantage of LangChain. Bruce Croft1 Mohit Iyyer1 1 University of Massachusetts Amherst 2 Ant Financial 3 Alibaba Group {chenqu,lyang,croft,miyyer}@cs. The answer is not simple. """Question-answering with sources over an index. You can also use ChatGPT for your QA bot. Conversational. Conversational question answering (QA) requires the ability to correctly interpret a question in the context of previous conversation turns. I understand that you're seeking clarification on the difference between ConversationChain and ConversationalRetrievalChain in the LangChain framework. dosubot bot mentioned this issue on Sep 16. A model that can answer any question with regard to factual knowledge can lead to many useful and practical applications, such as working as a chatbot or an AI assistant🤖. For the best QA. It first combines the chat history (either explicitly passed in or retrieved from the provided memory) and the question into a standalone question, then looks up relevant documents from the retriever, and finally passes those documents and the. Alshammari, S. langchain. Other agents are often optimized for using tools to figure out the best response, which is not ideal in a conversational setting where you may want the agent to be able to chat with the user as well. From what I understand, you were asking for clarification on the difference between ConversationChain and ConversationalRetrievalChain in the LangChain framework. """Chain for chatting with a vector database. 1. Introduction. This project is built on the JS code from this project [10, Mayo Oshin. Extends. One thing you can do to speed up is by using only the top similar knowledge retrieved from KB and refine your prompt and set max_interactions to 2-3 depending on your application. ; A number of extra context features, context/0, context/1 etc. ConversationalRetrievalChainでは、まずLLMが質問と会話履歴. But wait… the source is the file that was chunked and uploaded to Pinecone. Agent utilizing tools and following instructions. It first combines the chat history (either explicitly passed in or retrieved from the provided memory) and the question into a standalone question, then looks up relevant documents from the retriever, and finally. py","path":"langchain/chains/qa_with_sources/__init. Bruce Croft1 Mohit Iyyer1 1 University of Massachusetts Amherst 2 Ant Financial 3 Alibaba Group {chenqu,lyang,croft,miyyer}@cs. In that same location. GitHub is where people build software. Adding the Conversational Retrieval QA Chain Node The final node that we are going to add is the Conversational Retrieval QA Chain node (under the Chains group). st. If you're just getting acquainted with LCEL, the Prompt + LLM page is a good place to start. Currently, there hasn't been any activity or comments on this issue. To handle these tasks, a C-KBQA system is designed as a task-oriented dialog system as in Fig. data can include many things, including: Unstructured data (e. I use the buffer memory now. qa_with_sources. In some applications, like chatbots, it is essential to remember previous interactions, both in the short and long-term. Working together, with our mutual focus on flexibility and ease of use, we found that LangChain and Chroma were a perfect fit. LangChain provides memory components in two forms. With the data added to the vectorstore, we can initialize the chain. env file. Let's now look at adding in a retrieval step to a prompt and an LLM, which adds up to a "retrieval-augmented generation" chain: const result = await chain. {"payload":{"allShortcutsEnabled":false,"fileTree":{"langchain/src/chains":{"items":[{"name":"api","path":"langchain/src/chains/api","contentType":"directory"},{"name. He also said that she is a consensus. From what I understand, you were having trouble changing the system template in conversationalRetrievalChain. Actual version is '0. We hope this release will foster exploration of large-scale pretraining for response generation by the conversational AI research. Chat Models take a list of chat messages as input - this list commonly referred to as a prompt. from langchain. 5-turbo) to auto-generate question-answer pairs from these docs. Researchers, educators and companies are experimenting with ways to turn flawed but famous large language models into trustworthy, accurate ‘thought partners’ for learning. This walkthrough demonstrates how to use an agent optimized for conversation. It first combines the chat history. This is done with the goals of (1) allowing retrievers constructed elsewhere to be used more easily in LangChain, (2) encouraging more experimentation with alternative retrieval methods (like. Output is streamed as Log objects, which include a list of jsonpatch ops that describe how the state of the run has changed in each step, and the final state of the run. You must provide the AI with the metadata and instruct it to translate any queries/questions to German and use it to retrieve the relevant chunks with the. Chat prompt template . 198 or higher throws an exception related to importing "NotRequired" from. liu, cxiong}@salesforce. You signed out in another tab or window. Hello, Based on the information you provided and the context from the LangChain repository, there are a couple of ways you can change the final prompt of the ConversationalRetrievalChain without modifying the LangChain source code. Asynchronous function that creates a conversational retrieval agent using a language model, tools, and options. edu {luanyi,hrashkin,reitter,gtomar}@google. To resolve the type mismatch issue when adding the KBSearchTool to the list of tools in your LangChainJS application, you need to ensure that the KBSearchTool class extends either the StructuredTool or Tool class from the tools. This documentation covers the steps to integrate Pinecone, a high-performance vector database, with LangChain, a framework for building applications powered by large language models (LLMs). From almost the beginning we've added support for memory in agents. memory import ConversationBufferMemory. But there's no mention of qa_prompt in ConversationalRetrievalChain, or its base chain. g. <br>Detail-oriented and passionate about problem-solving, with a commitment to driving innovation<br>while. {"payload":{"allShortcutsEnabled":false,"fileTree":{"langchain/chains/retrieval_qa":{"items":[{"name":"__init__. It first combines the chat history (either explicitly passed in or retrieved from the provided memory) and the question into a standalone question, then looks up relevant documents from the retriever, and finally passes those documents and the. fromLLM( model, vectorstore. A chain for scoring the output of a model on a scale of 1-10. base. Input the necessary information. going back in time through the conversation. retrieval. 2 min read Feb 14, 2023. llm = OpenAI(temperature=0) The dependency between an adequate question formulation and correct answer selection is a very intriguing but still underexplored area. conversational_retrieval. Open up a template called “Conversational Retrieval QA Chain”. ust. 8 Langchain have added this function ConversationalRetrievalChain which is used to chat over docs with history. , Python) Below we will review Chat and QA on Unstructured data. Question answering (QA) systems provide a way of querying the information available in various formats including, but not limited to, unstructured and structured data in natural languages. I wanted to let you know that we are marking this issue as stale. e. from_llm(OpenAI(temperature=0. However, this architecture is limited in the embedding bottleneck and the dot-product operation. 1 * 7. We’re excited to announce streaming support in LangChain. It involves defining input and partial variables within a prompt template. from langchain. description = 'Document QA - built on RetrievalQAChain to provide a chat history component'Conversational search plays a vital role in conversational information seeking. For more examples of how to test different embeddings, indexing strategies, and architectures, see the Evaluating RAG Architectures on Benchmark Tasks notebook. from_llm () method with the combine_docs_chain_kwargs param. the process of finding and bringing back something: 2. from langchain. . chains. chains import ConversationChain. Hi, thanks for this amazing tool. From what I understand, you opened this issue regarding the ConversationalRetrievalChain. You can also choose instead for the chain that does summarization to be a StuffDocumentsChain, or a RefineDocumentsChain. The question rewriting (QR) subtask is specifically designed to reformulate ambiguous questions, which depend on the conversational context, into unambiguous questions that can be correctly interpreted outside of the conversational context. com The ConversationalRetrievalQA chain builds on RetrievalQAChain to provide a chat history component. See the below example with ref to your provided sample code: template = """Given the following conversation respond to the best of your ability in a. Hi, @DennisPeeters!I'm Dosu, and I'm here to help the LangChain team manage their backlog. The process includes domain experts who monitor a model's output and provide feedback to help the model learn their preferences and generate a more suitable response. The chain is having trouble remembering the last question that I have made, i. Answers to customer questions can be drawn from those documents. Langchain’s ConversationalRetrievalQA chain is adept at retrieving documents but lacks support for an output parser. CONQRR: Conversational Query Rewriting for Retrieval with Reinforcement Learning Zeqiu Wu} Yi Luan Hannah Rashkin David Reitter Hannaneh Hajishirzi}| Mari Ostendorf} Gaurav Singh Tomar }University of Washington Google Research |Allen Institute for AI {zeqiuwu1,hannaneh,ostendor}@uw. Computers can solve incredibly complex math problems, yet if we ask GPT-4 to tell us the answer to 4. from langchain. However, this architecture is limited in the embedding bottleneck and the dot-product operation. As of today, OpenAI doesn't train models on inputs and outputs through API, as stated in the official OpenAI documentation: But, technically speaking, once you make a request to the OpenAI API, you send data to the outside world. Langflow uses LangChain components. A user study reveals that our system leads to a better quality perception by users. This is a big concern for many companies or even individuals. Until now. To see the performance of various embedding…. I'd like to combine a ConversationalRetrievalQAChain with - for example - the SerpAPI tool in LangChain. CoQA paper. Authors Svitlana Vakulenko, Nikos Voskarides, Zhucheng Tu, Shayne Longpre 070 as they are separately trained before their predicted 071 rewrites being used for retrieval at inference. Next, let’s replace "text file” with “PDF file,” and the new workflow diagram should look like this:Enable “Return Source Documents” in the Conversational Retrieval QA Chain Flowise widget. Let’s see how it works. hkStep #2: Create a Flowise project. The LLMChainExtractor uses an LLMChain to extract from each document only the statements that are relevant to the query. In the below example, we will create one from a vector store, which can be created from embeddings. Search Search. A pydantic model that can be used to validate input. The sources are not. This post takes you through the most common challenges that customers face when searching internal documents, and gives you concrete guidance on how AWS services can be used to create a generative AI conversational bot that makes internal information more useful. New comments cannot be posted. And then passes those documents and the question to a question-answering chain to return a. We then use those returned relevant documents to pass as context to the loadQAMapReduceChain. See Diagram: After successfully. as_retriever ()) Here is the logic: Start a new variable "chat_history" with. 🤖. ConversationalRetrievalChain are performing few steps:. For instance, a two-dimensional table follows the format of columns on the x-axis, and rows, or records, on the y-axis. vectors. Interface for the input parameters of the ConversationalRetrievalQAChain class. Quest - Words of Wisdom - Answer Key 1998-01 libros de energia para madrugadores early bird energy teaching guide Quest - the Only True God 2011-07Question answering (QA) systems provide a way of querying the information available in various formats including, but not limited to, unstructured and structured data in natural languages. When. Colab: this video I look at how to load multiple docs into a single. "To get a sense of how RAG works, let’s first have a look at Augmented Generation, as it underpins the approach. However, such a pipeline approach not only makes the reader vulnerable to the errors propagated from the. Open Source LLMs. Generated by DALL-E 2 Table of Contents. First, LangChain provides helper utilities for managing and manipulating previous chat messages. For example, if the class is langchain. Hi, @miha-bhaskaran!I'm Dosu, and I'm helping the LangChain team manage our backlog. llms import OpenAI. Once all the relevant information is gathered we pass it once more to an LLM to generate the answer. The memory allows a L arge L anguage M odel (LLM) to remember previous interactions with the user. retrieval definition: 1. . Open-Domain Conversational Question Answering (ODConvQA) aims at answering questions through a multi-turn conversation based on a retriever-reader pipeline, which retrieves passages and then predicts answers with them. According to their documentation here. Source code for langchain. Hi, @FloWsnr!I'm Dosu, and I'm helping the LangChain team manage their backlog. temperature) retriever = self. js. The types of the evaluators. dosubot bot mentioned this issue on Aug 10. Wecombinedthepassagesummariesandthen(7)CoQA is a large-scale dataset for building Conversational Question Answering systems. Once enabled, I checked out the object structure in my debugger to learn which field contained the source. Chat containers can contain other. One way is to input multiple smaller documents, after they have been divided into chunks, and operate over them with a MapReduceDocumentsChain. Is it possible to have the component called "Conversational Retrieval QA Chain", but that would use a memory buffer ? To remember the rest of the conversation, not only the last prompt. Here is the link from Langchain. To further its capabilities, an output parser that extends from the BaseLLMOutputParser provided by Langchain is integrated with a schema. Source code for langchain. ust. Be As Objective As Possible About Your Own Work. But wait… the source is the file that was chunked and uploaded to Pinecone. Towards retrieval-based conversational recommendation. We compare our approach with two neural language generation-based approaches. In collaboration with University of Amsterdam. to our functions webinar this Wednesday to talk through his experience using it!i have this lines to create the Langchain csv agent with the memory or a chat history added to itiwan to make the agent have access to the user questions and the responses and consider them in the actions but the agent doesn't recognize the memory at all here is my code >>{"payload":{"allShortcutsEnabled":false,"fileTree":{"chains":{"items":[{"name":"testdata","path":"chains/testdata","contentType":"directory"},{"name":"api. Reload to refresh your session. In that same location is a module called prompts. llms import OpenAI. From what I understand, you were asking if there is a JavaScript equivalent to the ConversationalRetrievalQA chain type that can handle chat history and custom knowledge sources. This example demonstrates the use of Runnables with questions and more on a SQL database. LangChain for Gen AI and LLMs by James Briggs. , Python) Below we will review Chat and QA on Unstructured data. Reminder: in order to use google search API (SerpApi), you can sign up for an account here. Cookbook. The algorithm for this chain consists of three parts: 1. What you’ll learn in this course. 1. Language Translation Chain. . These examples show how to compose different Runnable (the core LCEL interface) components to achieve various tasks. And with NVIDIA AI Foundation Endpoints, their applications can be connected to these models running on a fully accelerated stack to test performance. One of the first demo’s we ever made was a Notion QA Bot, and Lucid quickly followed as a way to do this over the internet. This chain takes in chat history (a list of messages) and new questions, and then returns an answer to that question. Langflow uses LangChain components. Can do multiple retrieval steps. We utilize identifier strings, i. . # RetrievalQA. This is an agent specifically optimized for doing retrieval when necessary while holding a conversation and being able to answer questions based on previous dialogue in the conversation. from_documents (docs, embeddings) Now create the memory buffer and initialize the chain: memory = ConversationBufferMemory (memory_key="chat_history",. Move away from manually building rules-based FAQ chatbots - it’s easier and faster to use generative AI in. , PDFs) Structured data (e. Alhumoud: TAQS: An Arabic Question Similarity System Using Transfer Learning of BERT With BiLSTM The digital footprint of human dialogues in those forumsA conversational information retrieval (CIR) system is an information retrieval (IR) system with a conversational interface which allows users to interact with the system to seek information via multi-turn conversations of natural language, in spoken or written form. QAConv: Question Answering on Informative Conversations Chien-Sheng Wu 1, Andrea Madotto 2, Wenhao Liu , Pascale Fung , Caiming Xiong1 1Salesforce AI Research 2The Hong Kong University of Science and Technology {wu. This chain takes in chat history (a list of messages) and new questions, and then returns an answer to that question. Table 1: Comparison of MMConvQA with datasets from related research tasks. In the below example, we will create one from a vector store, which can be created from. 1 that have the capabilities of: 1. To test the chatbot at a lower cost, you can use this lightweight CSV file: fishfry-locations. One way is to input multiple smaller documents, after they have been divided into chunks, and operate over them with a MapReduceDocumentsChain. Question answering. 它首先将聊天历史(可以是显式传入的或从提供的内存中检索到的)和问题合并成一个独立的问题,然后从检索器中查找相关文档,最后将这些. Summarization. Figure 1: An example of question answering on conversations and the data collection flow. Open-Retrieval Conversational Question Answering Chen Qu1 Liu Yang1 Cen Chen2 Minghui Qiu3 W. edu {luanyi,hrashkin,reitter,gtomar}@google. From what I understand, you were having trouble changing the system template in conversationalRetrievalChain. Sometimes, this isn't needed! If the user is just saying "hi", you shouldn't have to look things up. Connect to GPT-4 for question answering. Introduction. Check out the document loader integrations here to. This is done so that this. A template may include instructions, few-shot examples, and specific context and questions appropriate for a given task. 8,model_name='gpt-3. Our chatbot starts with the ConversationalRetrievalQA chain, ConversationalRetrievalChain, which builds on RetrievalQAChain to provide a chat history component. # doc string prompt # prompt_template = """You are a Chat customer support agent. asRetriever(15), {. . Moreover, it can be expensive to re-train well-established retrievers such as search engines that are. s , , = · + ˝ · + · + ˝ · + +You can create custom prompt templates that format the prompt in any way you want. I tried to chain. Next, we will use the high level constructor for this type of agent. LlamaIndex is a software tool designed to simplify the process of searching and summarizing documents using a conversational interface powered by large language models (LLMs). Evaluating Quality of Chatbots and Intelligent Conversational Agents Nicole Radziwill and Morgan Benton Abstract: Chatbots are one class of intelligent, conversational software agents activated by natural language input (which can be in the form of text, voice, or both). Chain for having a conversation based on retrieved documents. Reload to refresh your session. It first combines the chat history (either explicitly passed in or retrieved from the provided memory) and the question, then looks up relevant. type = 'ConversationalRetrievalQAChain' this. SQL.