You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Carol Phillips. I need to change my existing reservation, can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: We didn't find any reservation on your name to change.

USER: That's ok, thank you for searching my details.

ASSISTANT: Thank you.