You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I would like to cancel my reservation as my exams cancelled, can you please help me out with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name to check your reservation status?

USER: Myself Kevin Green.

ASSISTANT: Ok, please be on hold for a while. Sorry we could not find any reservation against your name.

USER: Ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for choosing us.