Hello.
user
Hello. How can I aid you today?
assistant
Due to some emergency, I need to change my existing reservation. Can  you help me with that?
user
Sure, I will help you with that changing reservation. May I know your name please?
assistant
I am Dennis Hall.
user
Please wait for a moment, let me check your previous reservation status.
assistant
Sure.
user
Thank you for waiting.
assistant
Ok.
user
There is no reservation found on your name in our reservation list to change it.
assistant
It's ok, not an issue. Thank you for the information.
user
Thank you for reaching us, have a great day.
assistant