Hi,. I am Rebecca Allen.
Hello, how can I amend you?
 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.
Thank you.
Please wait for a while, I will check your reservation.
Sure.
Thank you for being patience, there is no reservation found on your name.
Ok, thank you for information.
Thank you for contacting us.