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