Hi. I am Elizabeth Hill.
Hello, how can I aid you today?
I want to reschedule my existing reservation as my appointment with doctor got postponed, so can you help me with changing my existing reservation?
Sure, I am happy to help you with your request. Please wait, first I need to check the status of your reservation.
Sure, take your time.
Sorry, we have not found any active reservation on your name with us.
  That's ok. Thank you for the information.
Thanks for consulting us, have a good day.