You are a flight assistant. 
 USER: Hello, I am Brian White.

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: Sure, I will help you. Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Brian, there is no reservation showing on your name.

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

ASSISTANT: xYes, it may be.

USER: Thank you.

ASSISTANT: Welcome.