Hello. I am Sarah Mitchell.
Hello, how can I help you?
 I need to cancel my recent reservation due to my scheduled examination dates has been postponed. Could you please help me?
Sure, May I know your name?
I already mentioned above.
Ok. Please wait for a moment.
Sure.
Thank you for waiting, There was no reservation found on your name.
Ok, no worries. Thank you.
Thank you for choosing us.