Hello, I am Betty Hill.
user
Hello, how can I serve you today?
assistant
I want to change my existing reservation due to some emergency can you please help me out in changing it?
user
Sure, please wait for a moment.
assistant
Sure.
user
Sorry to say that, no reservation was found with your good name.
assistant
No problem. Thank you for the information.
user
Thank you for opting us.
assistant