Hi.
 Hello, How can I best serve you today?
Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?
Sure, I am here to help you with that, can I know your good name to proceed further?
I am Charles Hill.
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
No issue, thanks for the information.
Thank you for choosing us.