Update app.py

app.py

@@ -551,7 +551,7 @@ def payment_state(state: VisitorState):
     else:
         return {"messages": ["Payment failed due to an error. Please try again later."], "next": END}
 
-def final_state(state: VisitorState)
+def final_state(state: VisitorState):
     """FinalState: Send email confirmation and finalize the appointment."""
     if state.payment_confirmed:
         appointment_details = f"Doctor: {state.doctor_name}\nTime: {state.selected_slot}"