Hello, I am Joshua Davis.
Hello. How can I assist you?
 I make a reservation earlier to attend a get together party with my college friends. Due to some issues in college it is postponed.
Ok.
Can you help me in changing my existing reservation?
Yes, I can help you with that. Sorry to inform you that there is no reservation found on your name.
It's ok, not an issue.
Thank you for opting us.