Hello, myself Mark Davis.
Hello, how can I help you?
Could you mind help me in booking  a flight ticket from MSP to IAD?
Sure, can you please tell your travelling dates?
Definitely, I would like to fly on 03/19 and 03/21.
Southwest airlines is available with 1 connection and ticket price is just 100. Shall I proceed with it?
That's perfect, please reserve me a seat.
Your reservation is confirmed with flight 1005.
Thank you for your quick service.
Thank you and have a nice day.