Hi.
Hello. How can I aid you?
This is with reference to my booking with your booking agency last week. I'm sorry to inform you that I won't be able to make it due to my exams has arrived, hence I would like to cancel my booking.
Sure, I am glad to help you. May I know your name?
Myself David Moore.
Noted, please wait a moment.
Ok.
Sorry, I didn't find any reservation on your name to cancel your reservation.
Ok, fine thank you.
All the best for your exams.