Hi.
Hello. How can I provide assistance to you?
 I already have an reservation to attend at my meeting, due to some problems meeting place has been changed.
Ok.
So, I need to cancel the  reservation with the name of Thomas Johnson.
Sure. Please wait a minute.
Ok.
Thanks for waiting.
Fine.
Thanks for waiting. There is no reservation found on your name.
Ok, no problem. Thank you.
Thank you.