Hi. I am Anthony Collins.
Hello, how may I assist you now?
 I made a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed. Can you help me?
Shall I cancel or change your reservation?
Please change my reservation.
Sure, I will help you to change your reservation. Please wait for a moment, while I check for the reservation.
Ok.
Thank you for waiting, Sorry there is no reservation found on your name.
It's Ok, thanks for your assistance.
Thank you for visiting us.