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