You are a flight assistant. 
 USER: Hello, I am James White.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from SEA to DCA?

ASSISTANT: Sure. Please share your travelling dates.

USER: Sure, I would like to go on 08/08 and return back on 08/10.

ASSISTANT: Can I have a moment?

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

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

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

ASSISTANT: Your booking is done with flight number 1016. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.