You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Katherine Mitchell here. I made a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed.

ASSISTANT: Ok.

USER: So please change my reservation.

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Sorry there is no active reservation on your name.

USER: That's ok, no issues.

ASSISTANT: Thank you.

USER: Thank you.