You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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, may I know your name?

USER: Sure, I am Brandon Clark.

ASSISTANT: There is no reservation on your name.

USER: Ok. Thank you for providing information.

ASSISTANT: Thank you so much.