Hello.
Hello, how may I assist you?
 I am Jessica Hill want to change my reservation due to prepone of my exams.
Ok.
 Can you help me in changing?
Sure, I am here to assist you. Please wait for a while.
Ok.
Thanks for your time, there is no active reservation made in your name to change.
Ok, thank you for your response.
Thank you for choosing us, have a good day.