Hi. I am Brandon Lee.
Hello, how may I help you?
I would like to visit White House at Washington.Can you help me with booking a flight ticket?
Sure,  please provide your journey details?
My travelling dates are from 02/09 to 02/11. Airport codes: LGA to IAD. Connection limit is 1.
Please wait for a while, I will check and revert you.
Sure.
Sorry there were no flights matching your preferences.
Ok, No problem. Thanks for the information.
Thank you for reaching us, have a good day.