You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: May I know your name please?

USER: I am Kevin Thompson.

ASSISTANT: Please wait, I will fetch your reservation and return back to you soon.

USER: Sure.

ASSISTANT: We didn't find your reservation on your name in our system to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you.