Update app.py

app.py

@@ -33,7 +33,7 @@ def respond(message, chat_history):
                                                "maximal_marginal_relevance":True,
                                                "k":10})
 
-    if len(chat_history) == 0: 
+    if len(chat_history) != 0: 
         chat_history = chat_history[1]
     
     # Create ChatOpenAI and ConversationalRetrievalChain