You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: I am Sharon Wilson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sharon Wilson, there is no active reservation found under your name to do cancellation.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.