You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Can I know your name please?

USER: 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? My name is Charles Allen.

ASSISTANT: We are here to help you. We did not find any reservation on your name to cancel.

USER: Ok, no issues.

ASSISTANT: Thank you for picking us.

USER: Thanks for the help.

ASSISTANT: Have a pleasant day.