You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Help me in cancelling my reservation?

ASSISTANT: Sure. May I know your name please?

USER: I am Steven Hall.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name to cancel it.

USER: That's ok, thank you.

ASSISTANT: You are welcome.