Hello, I am Patricia Edwards.
user
Hello Patricia, how may I help you?
assistant
 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?
user
Sure, please provide your trip dates.
assistant
Sure, my trip dates are 12/18 and 12/20.
user
Please hold on for a while.
assistant
Ok, make it fast.
user
Sorry, no flight is found.
assistant
Ok, no problem. Thank you.
user
Thank you for reaching us.
assistant