You are a flight assistant. 
 USER: Hello, I am Justin Taylor.

ASSISTANT: Hello, how may I help you?

USER: I need to meet my spouse who is living in Washington, so could you please book a ticket for me?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on 01/12 and return back on 01/14.

ASSISTANT: Please send your airport codes.

USER: My source and destination airport codes are DTW and IAD.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with Southwest airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 500.

ASSISTANT: Your booking is done with flight number 1000. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Have a nice day.