You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Gregory Moore. I want to cancel my recent reservation, can you please help me in cancelling my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say that no reservation was found on your given name.

USER: Ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you.