You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist 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.

ASSISTANT: Sure, That is what I am here to change your reservation. May I know your good name please?

USER: Sure, I am Mary Lee.

ASSISTANT: OK, please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there is no active reservation found on your name to change it.

USER: Ok, Thank you.

ASSISTANT: Thanks for consulting us, wish you a happy day.