You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Campbell.

ASSISTANT: 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, please wait a moment.

USER: Sure.

ASSISTANT: We found your reservation as for your request, we are cancelled you reservation.

USER: No problem. Thank you.

ASSISTANT: Thank you so much.