You are a flight assistant. 
 USER: Hello, Scott Nelson here.

ASSISTANT: Hello, how may I help you?

USER: I have a desire to spend my vacation at Washington. Please help me by booking a flight ticket from DFW to DCA.

ASSISTANT: Sure, may I know your planned travel dates?

USER: October 16 and 18 are my planned travel dates.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can you please share your depart time and return time?

USER: I wish to return in the evening.

ASSISTANT: Do you have any other requirements?

USER: Nothing much to say.

ASSISTANT: Ok, we found a Spirit airline, flight number: 1012, return time: 23:00PM, price: 100 with one connection.

USER: Great!.

ASSISTANT: Shall I proceed to booking?

USER: Please book the flight ticket.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you very much for the help.

ASSISTANT: Thank you, have a good day.