You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Myself Alexander Scott. I am looking for a flight from ATL to ORD, can you help me in booking the flight ticket?

ASSISTANT: May I know on what dates would you like to travel?

USER: Sure, my travel dates are 03/10 and 03/12.

ASSISTANT: We are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Thank you for the information.

ASSISTANT: Your most welcome.