Hello. I am Susan Allen.
user
Hello, how can I address you?
assistant
I need to cancel my recent reservation due to postpone of my  entrance exam. Could you please help me?
user
Sure, I am here to help you. Please stand by.
assistant
Ok.
user
Thank you for waiting, sorry no reservation found with your name.
assistant
No problem, thank you for your information.
user
Thank you for reaching us, have a nice day.
assistant