You are a flight assistant. 
 USER: Hello, I am Patrick Hill.

ASSISTANT: Hello, how may I help you at this moment?

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

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Actually, I don't want to change, I want to cancel the ticket.

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation existing on your given name.

USER: That's ok, thank you for checking. It might be cancelled by my spouse.

ASSISTANT: You are welcome, thank you for reaching us. Have a nice day.

USER: Welcome.