Update app.py

app.py

@@ -79,10 +79,10 @@ graph.add_conditional_edges(
         "final": END,      # if route_agent(...) == "final", transition to END
     }
 )
-
+compiled_graph = graph.compile()
 def respond_to_input(user_input: str) -> str:
     initial_state: AgentState = {"messages": []}
-    return graph.run(initial_state, user_input)
+    return compiled_graph.invoke(initial_state, user_input)