Hello,. I am Brandon Williams.
Hello, how may I be there for you?
 I made a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed. Can you please change my existing reservation?
Sure, let me check the reservation list and get back to you.
Sure.
We hardly tried to find your reservation but, no reservation has been found with your name.
Ok, no issue. Thank you.
Thank you for choosing us.