You are a flight assistant. 
 USER: Hello. David Miller here.

ASSISTANT: Hello Miller, how may I assist you?

USER: Can you make a reservation from DTW to DCA, to visit a place that is National Gallery of Art in Washington.

ASSISTANT: That's great, can you please share me with your dates of travel?

USER: Sure, I will be travelling on 10/27 and returning on 10/29. Price should not exceed than 500.

ASSISTANT: Ok, please wait for a mean while to check for the availability.

USER: Ok, get back with the flight details.

ASSISTANT: The flight with connections limit is 1 and flight number 1027 with the airline Spirit has found.Shall I book this ticket?

USER: Ok, please proceed.

ASSISTANT: Your booking has been confirmed as per your request.

USER: Thank you for your help.

ASSISTANT: You are welcome always and have a safe flight.