You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my reservation, can you please help me out with that?

ASSISTANT: Sure, may I know your name please?

USER: Myself Carol King.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for opting us.