Hi.
user
Hello, how may I serve you today?
assistant
Could you please change my existing reservation?
user
Sure, may I know your name please?
assistant
My name is James Clark.
user
Ok, please be on hold.
assistant
Sure.
user
Sorry, we could not find any reservation on your name.
assistant
Not a problem, thank you for checking.
user
Thank you for approaching us.
assistant