You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Johnathan King here. Can you please aid me to book a flight from DCA to DTW?

ASSISTANT: Sure, may I know your connection limit?

USER: Sure, I need a flight with single connection.

ASSISTANT: Can you please share your planned travel dates?

USER: My travelling dates are Mar 20 - Mar 22.

ASSISTANT: May I know your depart time and return time?

USER: Ok, my return time is must be in the evening.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, we found a Southwest airline, flight number: 1020, return time: 1:00AM, price: 100 with one connection.

USER: Ok, please proceed for booking.

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

USER: Thank you.

ASSISTANT: Thank you for choosing us.