Hello, I am Nancy Harries.
Hello, how can I be at your service today? Thank you for providing your  name.
I want to reschedule my recent reservation as my exams got postponed. Can you help me with it?
Sure, we are glad to help you. Please wait for a while, I will check the reservation list and revert you.
Ok.
Thank you for waiting. We are sorry to inform you that, we couldn't find any reservation on your name.
That's Ok.
Thank you for reaching us. Have a pleasant day.