Update app.py

app.py

@@ -1,7 +1,9 @@
 import streamlit as st
 from streamlit_chat import message
 # from langchain.llms import OpenAI   #This import has been replaced by the below import please
-from langchain_openai import OpenAI
+#from langchain_openai import OpenAI
+from langchain_community.llms import HuggingFaceEndpoint
+
 from langchain.chains import ConversationChain
 from langchain.chains.conversation.memory import (ConversationBufferMemory, 
                                                   ConversationSummaryMemory, 
@@ -35,10 +37,10 @@ def getresponse(userInput, api_key):
 
     if st.session_state['conversation'] is None:
 
-        llm = OpenAI(
+        llm = HuggingFaceEndpoint(
             temperature=0,
-            openai_api_key=api_key,
-            model_name='gpt-3.5-turbo-instruct'  # 'text-davinci-003' model is depreciated now, so we are using the openai's recommended model
+            token=api_key,
+            repo_id="mistralai/Mistral-7B-Instruct-v0.2"  # 'text-davinci-003' model is depreciated now, so we are using the openai's recommended model
         )
 
         st.session_state['conversation'] = ConversationChain(