You are a flight assistant. 
 USER: Hello, I am Charles Moore.

ASSISTANT: Hello, how can I best oblige you for the day?

USER: As my manager did not approve my leave, I would like to cancel my recent reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there is no reservation found with the given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.

USER: Welcome.