Hello, I am Scott Lee.
Hello. How may I support you now?
My interview has been postponed so, I want to change my existing reservation.
Ok.
Can you help me with this?
Sure. Please wait a while.
Sure, I will wait.
Thanks for your patience. We found that there was no reservation  with your name to change.
Ok, Thank you for your service.
Thanks for connecting us have a nice day.