You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Anthony Carter. I want to cancel my reservation.

ASSISTANT: Please wait a moment, I will check and revert to you.

USER: Ok.

ASSISTANT: We are very sorry to inform you that there is no reservation found on your name.

USER: Ok, not a problem. Thanks for your time.

ASSISTANT: Thank you for choosing us.