Hi. I am Anthony Collins.
user
Hello, how may I assist you now?
assistant
 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?
user
Shall I cancel or change your reservation?
assistant
Please change my reservation.
user
Sure, I will help you to change your reservation. Please wait for a moment, while I check for the reservation.
assistant
Ok.
user
Thank you for waiting, Sorry there is no reservation found on your name.
assistant
It's Ok, thanks for your assistance.
user
Thank you for visiting us.
assistant