Hello.
user
Hello, how may I help you?
assistant
I have postponed my trip. So please help me to change the existing reservation.
user
Sure, just wait for a while. May I know your name?
assistant
My name is Patrick Allen. Please make it fast.
user
I am really sorry Patrick, there is no reservation found with your name to change,.
assistant
It's ok, thank you for the information.
user
Most welcome.
assistant