Hello.
user
Hello. How may I help you?
assistant
Due to change in my plan to visit Dallas, I would like to change my existing reservation.
user
Sure, please wait for a minute to check. May I know your name?
assistant
My previous reservation has done with the name of Gary Allen.
user
No reservation found on your name. Sorry for inconvenience.
assistant
Ok, may be my brother has already changed my reservation on behalf of me.
user
Ok.
assistant
Thank you for providing information.
user
You are welcome.
assistant