Hello. I am Shirley Allen.
Hello, how can I help you?
 I have planned to consult a doctor for monthly check up due to more emergency operations scheduled to him my appointment has been changed.  can you help me in changing my reservation?
Sure, I am here to help you. Please wait a minute.
Ok.
Thank you for waiting, sorry we didn't find any reservation on your name.
Ok, no issues. Thank you for helping me.
Thank you for opting us, have a nice day.