Update app.py

app.py

@@ -126,10 +126,11 @@ class Chatbot:
             str: The answer to the question.
         """
 
-
+        chat_history = []
         # Retrieve the knowledge base from the state dictionary
         knowledge_base = state["knowledge_base"]
         retriever = knowledge_base.as_retriever()
+        chat_history.append(question)
         qa = ConversationalRetrievalChain.from_llm(
             llm=OpenAI(temperature=0),
             retriever=retriever,
@@ -148,6 +149,7 @@ class Chatbot:
         result = qa({"question": query, "chat_history": chat_history})
         # Perform a similarity search on the knowledge base to retrieve relevant documents
         response = result["answer"]
+        chat_history.append(response)
         # Return the response as the answer to the question
         history[-1][1] = response
         return history