You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please book ticket from ATL to DCA?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travel dates are Oct 11 and Oct 13.

ASSISTANT: Ok, do you have any specifications?

USER: I need a direct flight in the economy class.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you. I found a flight for you with Delta Airlines and it costs you 200. Shall I proceed to reserve a seat in this direct flight?

USER: Ok, proceed for booking.

ASSISTANT: On whose name you would like to book this ticket?

USER: Larry Collins here.

ASSISTANT: Your ticket has been booked with 1029 flight number.

USER: Thank you for booking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.