Hi, I am Pamela Scott.
user
Hello, how may I assist you today?
assistant
As my plan to give a presentation at Phoenix but due to bad weather conditions I need to  change an existing reservation. Can you help me with this?
user
Sure, please wait a minute I will revert to you with current status.
assistant
Ok.
user
Unfortunately, there is no reservation found with your name.
assistant
That's ok, thanks for your information.
user
Thank you for availing us.
assistant