You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need to travel DCA and ORD, can you please reserve flight ticket?

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

USER: My travelling dates are Dec,12 and Dec,14.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I prefer one connecting flight.

ASSISTANT: Could you please share your name?

USER: Myself Gregory Hill.

ASSISTANT: Do you have any other requirements?

USER: I prefer to depart in the afternoon only.

ASSISTANT: Southwest airline providing a direct flight in economy class.

USER: Please proceed with the reservation.

ASSISTANT: Your booking is done.

USER: Thank you for reserving my flight ticket.

ASSISTANT: Thank you.