Hello.
Hello. How can I help you today?
I want to change my existing reservation, due to some health issue. Can you help me?
Sure, I am here to help you with that. Can you please share your name?
Ok, I am Mary Lopez.
Please allow me a moment.
Sure.
Sorry,  there is no reservation found on your name in our database.
Ok, not a problem. Thank you for your help.
Thank you for reaching us, have a nice day.