Hi, I am Daniel Green.
user
Hello, how may I aid you today?
assistant
 I need to cancel my recent reservation due to my scheduled examination dates has been revised. Can you please help me in cancellation?
user
Sure, please wait for a moment.
assistant
Ok.
user
Thanks for waiting, we did not find any reservation with your name to cancel your reservation.
assistant
Ok, thanks for your response.
user
Thanks for choosing us.
assistant