You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Frank Thompson here. Suddenly my Shuttle tournament location is changed from Chicago to Los Angeles. Can you please help me for changing my reservation?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation in our data base.

USER: Ok, take your time.

ASSISTANT: Your patience is greatly appreciated. Frank, there is no reservation found under your name.

USER: Anyway, thank you for the information.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: Have a great day.