You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that I can do for you now?

USER: I would like to cancel my reservation due to heavy rainfalls in my travelling area, can you please help me out with that?

ASSISTANT: Sure, I can help you with flight ticket booking process and may I know your name for checking purpose?

USER: Thank you, I have reserved it on the name of Jack Lee.

ASSISTANT: Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: There is no reservation found for the user name in our back end to cancel the ticket.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for checking.

ASSISTANT: You are most welcome and thank you for approaching us.