You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I'm Barbara carter. I want to cancel my reservation which I had booked recently.

ASSISTANT: OK Barbara, Hold on for a moment. I'm sorry Barbara, there are no reservations on your name.

USER: OK.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your help.