Hello. I am William Anderson.
Hello, how may I be at your service today?
I am planning to change an existing reservation, due to health issue. Can you please change my reservation?
Sure, we are here to help you.
Thank you.
Please wait for a while.
Sure.
Sorry to inform you that, we did not find any reservation against your name.
That's fine, thank you for your service.
Thank you for opting us.