Update app.py

app.py

@@ -27,7 +27,9 @@ class BasicAgent:
         response = state_dict["messages"][-1]
         try:
             response = response.content
-            response = response.split("Final answer:")[1].strip()
+            if "Final answer:" in response:
+                response = response.split("Final answer:")[1]
+            response = response.strip()
             return response
         except:
             return "Sorry, I can't answer to this question."