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