Hello.
Hello. How may I assist you?
Due to some personal problem I am not able to travel, can you help me to cancel that reservation?
Ok, get me by giving your name so that I can help you easily.
Paul Perez here.
Please wait a moment, let me check the status of reservation.
Sure.
There is no reservation found on your name.
It's not a  problem, thanks for your checking.
Welcome, have a nice day.