You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at present?

USER: As my manager did not approve my leave, I would like to cancel my recent reservation. Can you aid me with this?

ASSISTANT: Sure, we are here to help you with cancellation.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Myself Sandra Phillips.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there was no reservation found on your name to cancel it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing our service.

USER: Welcome.