Hello,.
user
Hello, how can I assist you?
assistant
I want to change my existing reservation, as my exam got postponed.
user
Sure, may I know your name?
assistant
I am Christopher Turner.
user
Ok, please wait a moment.
assistant
Ok.
user
Sorry, there is no existing reservation on your name.
assistant
Ok, no problem. Thank you.
user
Thanks for choosing us.
assistant