Hello. I am Mary Lee.
user
Hello, how may I help you for the day?
assistant
 I need to cancel my recent reservation due to my scheduled examination dates has been postponed. Can you please help me?
user
Sure, please wait I will check the reservaation and get back to you.
assistant
Ok.
user
Sorry, there is no reservation found on your name.
assistant
Ok, no problem. Thank you.
user
Thank you for contacting us.
assistant