You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Melissa Carter. I would like to book a flight ticket which depart in the afternoon.

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are May 12 and May 14.

ASSISTANT: May I know your airport codes for booking?

USER: Sure, my airport codes are DFW to ATL.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: There is a direct flight with number 1020 in airline Spirit, the fare is 200 in economy class. Can I book it?

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.