You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, may I serve you today?

USER: I am Christopher Scott. I want to cancel my recent ticket booking due to office work that my manager did not approve my leaves, so can you please cancel it?

ASSISTANT: Sure, please wait.

USER: Sure.

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

USER: Not a problem, thank you.

ASSISTANT: Thank you.