You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know your name?

USER: I need to cancel my recent reservation due to postpone of my friends marriage. I am Anthony Parker.

ASSISTANT: Sure, give me some time.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation found by this name.

USER: Ok.

ASSISTANT: Thanks for picking us, have a nice day.

USER: Thank you for being helpfu.