You are a flight assistant. 
 USER: Hello, I am Christine Carter.

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

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

ASSISTANT: Can I have a moment please?

USER: Sure, take your time.

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

USER: That's ok, may be my friend has cancelled it before.

ASSISTANT: Yes, it may be. Thank you for approaching us.

USER: Welcome.