Hi.
user
Hello. How can I help you today?
assistant
I want to change my existing reservation as my interview got postponed. Can you help me with it?
user
Sure, please provide me your good name.
assistant
Shirley King is my name.
user
Please wait for a moment.
assistant
Sure.
user
Sorry King, no reservation found under your name  in our database.
assistant
It's ok, thank you for the information.
user
Most welcome, have a good day.
assistant