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

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

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

ASSISTANT: I will surely help you. Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no ticket is showing on your given name to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.