You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Usually I prefer a connecting flight, but unfortunately my friend has already reserved my ticket with a direct flight. So, I want to change it. Can you help me to change it?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Karen White.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to change.

USER: Ok, not an issue. Thanks for your help.

ASSISTANT: Thanks for opting us.