Update app.py

app.py

@@ -1,7 +1,8 @@
 from langchain.text_splitter import CharacterTextSplitter
 # from langchain.vectorstores import FAISS
 from langchain_community.vectorstores import FAISS
-from langchain.chat_models import ChatOpenAI
+# from langchain.chat_models import ChatOpenAI
+from langchain_community.chat_models import ChatOpenAI
 from langchain_openai import AzureChatOpenAI,AzureOpenAIEmbeddings
 from langchain.memory import ConversationBufferMemory
 from langchain.chains import ConversationChain