Hello,.
user
Hello, how may I help you for today?
assistant
My name is Anthony Lee, I want to change an existing reservation.
user
Sure Anthony, please wait a moment meanwhile I'll check the details of your existing reservation.
assistant
OK sure.
user
Sorry for the inconvenience, no reservation found on your name.
assistant
OK, Thank you for your service.
user
You are welcome. Have a nice day!.
assistant