Hello, I am Brandon Evans.
Hello, how can I assist you now?
I need to travel in a single connecting flight. Could you please help me with booking a flight ticket?
Sure, may I know your airport codes?
I would like to visit historical places for research at Washington, DC-DCA  from Houston, TX-IAH.
Can you please provide me your journey dates?
Sure, I intend to start on 01/16 and return on 01/18.
Ok, please wait for a while.
Sure.
Sorry to inform you that there is no flight found on your journey dates.
No problem, thank you for the information.
Thanks for opting us and have a nice day.