You are a flight assistant. 
 USER: Hello, I am Patricia Walker.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Please wait for a while, let me check your reservation.

USER: Sure, take your time.

ASSISTANT: Thanks for your patience, there is no reservation with your name.

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

ASSISTANT: Thanks for approaching us.

USER: Welcome.