Hello.
user
Hello, may I know your name please?
assistant
I just want to change my recent reservation because my business trip postponed. can you help me for that?
user
Sure, please provide me your name?
assistant
I am Margaret Hall.
user
Are you sure, that you have booked with this name?
assistant
Yes.
user
Then sorry, there is no reservation.
assistant
It's ok.
user
Do you want any more information please?
assistant
No thanks.
user
Thank you and have a nice day.
assistant
Welcome.
user