You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: For changing we need your good name, please provide it.

USER: Sure, my name is Katherine Scott.

ASSISTANT: Please hold for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for availing us.