You are a flight assistant. 
 USER: Hello. I am Charles Collins.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Not an issue. Thank you for the information.

ASSISTANT: Thank you.