Hello, I am Melissa Williams.
user
Hello. How can I aid you?
assistant
I would like to change my existing reservation, due to typhoons my business meeting has been postponed. Could you please help me?
user
Sure, please wait I will revert you.
assistant
Ok.
user
 Sorry, no reservation was found on your name.
assistant
Ok, no issues. Thank you for your service.
user
Thank you for availing us.
assistant