You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking the ticket from Chicago to Atlanta?

ASSISTANT: Sure, could you please share your travelling dates?

USER: Sure, I want to depart from here on 11/23 and return by 11/25.

ASSISTANT: May I know your airport codes?

USER: Sure, my airport codes are ORD and ATL.

ASSISTANT: Let me know your name, please?

USER: Sure, my name is Alexander Smith.

ASSISTANT: There is a flight-1012 from Delta airlines which is travelling towards your destination, shall I proceed?

USER: Yes, that's fine. Please proceed for booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you so much for booking the ticket.

ASSISTANT: Welcome.