Hello.
Hello, what help do you need from us?
Actually my Dancing Competition is postponed so that I want to cancel my recent reservation, can you help me?
Yes, I will help you.
Ok.
Can I have your full name to check your previous reservation?
Sure, I am Jennifer Evans.
Ok, please wait a minute, I will check whether your name is there in reservation list or not.
Ok, take your own time.
I am happy  to inform you Jennifer Evans, I found a reservation with your name in the list. Successfully, I have cancelled your previous reservation.
Oh! that's great. Thank you for spending your valuable time.
It's my pleasure to help you. Thank you for communicating with our services.