Hello.
user
Hello, can I know your name please?
assistant
My name is Richard Johnson.
user
Yes Richard, how can I help you?
assistant
Suddenly my trip plan is changed.So I want to change my reservation.
user
Sure, please wait a moment.
assistant
Ok.
user
Sorry, there is no reservation found by your name. Do you want any more information please?
assistant
No, thank you for the information.
user
Thank you and have a nice day.
assistant