Hello.
Hello, how may I help you?
I am Jessica Walker. Due to sudden change in the dates of summit which was going to be held in the place,so  I want to cancel my recent reservation, can you please help me?
Sure, please wait for a moment.
Ok.
Sorry Walker, there is reservation found as per your name.
It's ok. Thank you for your help.
Shall I proceed to cancel your reservation? Ok.
Please proceed.
Sure, your reservation has been cancelled.
Thank you for your service.
You are welcome.