Hi.
user
Hello, how may I serve you today?
assistant
I am Brian Baker, travelling to another place unexpectedly, so please change my existing reservation.
user
Sure, please give me a minute I will check the status and come back to you.
assistant
Sure.
user
Thank you for your time, sorry no reservation found with your name.
assistant
Ok. Thanks for your information.
user
Have a nice day.
assistant