Hello. I am Cynthia Thompson.
Hello Cynthia, how can I help you today?
I want to change my existing reservation, due to some health issue. Can you please help me out?
Sure, I am here to help you with that.
Thank you.
Please hold on for a while.
Ok, take your time.
Sorry  Cynthia Thompson, no reservation has found under your name to change.
That's ok, no problem. Anyway thank you for checking.
Thank you for choosing us, have a good day.