Hello,.
Hello, how may I serve you today?
Will you please assist me to book a ticket from  DFW to IAD?
Sure, could you please let me know your dates of journey?
My travelling dates are on Oct 08 and Oct 10.
May I know your name please?
My name is Richard Green.
Do you have any other requirements please?
No.
Please wait for a moment.
Sure.
There is a couple of connections limit of fare 400 with the UA airline, are you ok with this booking?
I need single connecting flight.
Sorry, there is no flight found as per your travelling details.
Ok, thank you for informing me.
You are welcome.