Hello, I am Benjamin Smith.
user
Hello, how can I help you?
assistant
I want to change an existing reservation.
user
Please wait a moment, I will check the reservation is there are not, I will get back to you.
assistant
OK.
user
Thanks for waiting, we found there is no reservation on your name.
assistant
Thanks for the information.
user
Thanks for choosing us, have a nice day.
assistant