Hello, I am Betty Phillips.
user
Hello, how can I assist you?
assistant
Due to an emergency meeting, I want to change my reservation. Can you help me with it?
user
 Ok, please wait I will revert you in a moment.
assistant
Ok.
user
 Sorry to inform you that no reservation was found on your name.
assistant
No problem, thank you for the information.
user
Thank you for availing us.
assistant