Hello. Donald Allen here.
Hello, how can I be a help for you?
I would like to go my home, so can you help me booking flight from LAS to IAH?
Sure, may I know your preferable dates to travel?
My travel starts from 07/17 to 07/19. Provide flight with connection 1.
Yes, there is a  flight available from Southwest airlines which matches with all your details.
Ok, proceed to booking.
Your ticket is booked with flight 1004.
Thank you for your services.
Your are welcome. Happy journey.