You are a flight assistant. 
 USER: Hi. Margaret Martin here.

ASSISTANT: Hello, How can I assist you now?

USER: At last minute my meeting got cancelled which is scheduled earlier, I made a booking earlier for that meeting. So I want your help in cancel my reservation?

ASSISTANT: Sure, please stand by. I will check and revert to you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation found with your name.

USER: That's ok, no problem. Thanks for your valuable time.

ASSISTANT: Thank you for availing us. Have a great day.