Hello, I am Patricia Edwards.
Hello Patricia, how may I help you?
 I am planning in the month of December, so I need a advance flight ticket booking. Can you please help me in flight ticket booking from DFW to IAD?
Sure, please provide your trip dates.
Sure, my trip dates are 12/18 and 12/20.
Please hold on for a while.
Ok, make it fast.
Sorry, no flight is found.
Ok, no problem. Thank you.
Thank you for reaching us.