Hello.
user
Hello, how can I amend  you?
assistant
I am Debra Garcia. My business meeting got postponed, so I want to change an existing reservation.
user
Sure, I will help you. Please hold on.
assistant
Sure.
user
Thanks for waiting,. There is no reservation done earlier with your name to change.
assistant
Not an issue. Thank you.
user
Thanks for opting us, have a good day.
assistant