Hello,.
user
Hello, what can I do for you?
assistant
I am Robert Roberts. My friend birthday was postponed, so please help me for change an existing reservation.
user
OK, hold on a minute, let me check the reservation on your name.
assistant
OK sure.
user
Sorry, we did not find any reservation on your given name.
assistant
OK, thank you for your service.
user
Thank you for reaching us.
assistant