You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Shirley Lee.

ASSISTANT: How can I assist you?

USER: Due a sudden meeting, my trip is cancelled. Could you help me in cancelling the reservation?

ASSISTANT: Yes, please wait for a while.

USER: Ok. That's ok.

ASSISTANT: I'm sorry, there are no reservation on your name.

USER: Thank you for your help.

ASSISTANT: You are welcome.