You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: My name is Jason Johnson. Actually I have a meeting to attend, but, due to some reasons my meeting is cancelled. Could you help me in cancelling the reservation?

ASSISTANT: I would be very happy to help you regarding your cancellation. Wait for a moment till I check for your existing reservation.

USER: Ok.

ASSISTANT: I'm very sad to inform you that, no reservation was found by your name. Thanks for choosing us.

USER: Thank you for your help.

ASSISTANT: Have a great day.