You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I have given some wrong details while booking my ticket earlier so please help me with changing my reservation.

ASSISTANT: Sure, please wait a moment. Can I have your name please?

USER: Thank you. Myself Kevin Green.

ASSISTANT: Sorry, no reservation has found under your name to change.

USER: That's ok, no problem.

ASSISTANT: Thank you for your time.

USER: Thank you.