Hi.
user
Hello, how may I serve you today?
assistant
Could please change my existing reservation due to postpone of my trip?
user
Sure, we are here to help you.
assistant
Thank you.
user
May I know your name please?
assistant
My name is David Carter.
user
Ok, please wait for few minutes.
assistant
Sure.
user
Sorry to inform you that, we did not find any reservation on your name.
assistant
Not a problem, thank you for checking.
user
Thank you for choosing us.
assistant