Hello.
Hello, how may I help you?
Can you please help me in booking a flight from DCA to reach ORD?
Sure, may I know your trip dates please?
Thank you, my travelling dates are Apr 6th and Apr 8th.
Do you have any other requirements?
I prefer a flight which has maximum  a single connection.
Can I know your name please?
Jason Johnson is my name.
Sorry, we regret to inform you that there is no flight available as per your request.
Ok, not an issue. Anyways, thank you for the information.
Most welcome.