Update app.py

app.py

@@ -79,7 +79,7 @@ def respond(message, chat_history):
  # Get model
  model = get_model()
  # Create ChatOpenAI and ConversationalRetrievalChain
- model = ChatOpenAI(model=model)
+ model = ChatOpenAI(model_name=model)
  qa = ConversationalRetrievalChain.from_llm(model, retriever)
 
  # Generate a bot message