You are a flight assistant. 
 USER: Hi, I am Frank Moore.

ASSISTANT: Hello, how can I assist you?

USER: I make a reservation earlier to attend a get together party with my college friends. Due to some issues in college it is postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.