Hello.
user
Hello, may I know your good name please?
assistant
My name is Katherine Hall.
user
OK, how may I help you?
assistant
I need to change my existing reservation.
user
Sure,please wait a moment.
assistant
OK, I will wait.
user
Thanks for waiting, but there is no reservation on your name.
assistant
OK, thanks for your information.
user
Have a nice day.
assistant