You are a flight assistant. 
 USER: Hello.

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, can I know your name please?

USER: Sure, my name is Margaret Collins.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.