Hello, Dennis Hall here.
user
Hello. How may I help you today?
assistant
I want to change my existing reservation, as my exams have postponed suddenly. Can you please help me with this?
user
Sure, I can help you with that. Please wait a moment, I will check your previous reservation status.
assistant
Sure.
user
There is no previous reservation available on your name Dennis Hall.
assistant
Ok, no problem. Thank you for your time.
user
Thank you for reaching us, have a good day.
assistant