Hello.
user
Hello, how may I aid you today from my end?
assistant
I am Michelle Hall. I want to change my existing reservation due to health issues, can you please help me with that?
user
Sure, I am here to help you out. Please allow me a moment.
assistant
Ok.
user
Sorry  Michelle Hall, there is no reservation on your name.
assistant
Ok, no problem. Thank you.
user
Thank you.
assistant