Hello, I am Rachel Carter.
Hello, how may I help you?
Can you please book a ticket from DFW to ORD?
Sure. Please share your journey dates.
Sure, I would like to go on 10/27 and return back on 10/29.
Can I have a moment please?
Ok, ensure it is a single connecting flight.
There is a connecting flight available with AA airline, shall I book it?
Ok, please proceed for further if it costs you below 500.
Your booking is done  with flight number 1000. Happy journey.
Thank you for booking.
You are welcome. Thank you for reaching us, have a nice day.