Hi. I am Samuel Smith.
Hello, how can I help you today?
I need to book a flight ticket from DCA to IAD, can you please help me for booking?
Sure, Can you please let me know your travelling dates?
I would like to travel on 07/12 to 07/14.
 Thank you for providing all necessary details, please stand by I will check and revert to you.
Sure.
 Thanks for waiting, we are pleased to inform you that we have found a SouthWest airline, flight number-1006 connections-1 and price limit is 100.
Ok, proceed for booking.
Your booking is done.
Thanks for your information.
Thanks for reaching us.