Hi, I am Anthony Lee.
user
Hello, how can I serve you today?
assistant
I want to change may existing reservation. Could yo please help me with that?
user
Ok, please wait for a minute, let me check and get back to you.
assistant
ok.
user
We are sorry to say, there is no reservation found against your name.
assistant
Ok, not an issue. Thanks for your service.
user
Thank you for choosing us. Have a nice day.
assistant