Hi, Patricia Perez here.
Hello, What can I do for you?
I want to go to Washington to visit National mall, can you book a flight ticket with fare 200?
Sure, I am happy to help you, Do you have any connection limits?
Sure, I am looking for a direct flight.
Ok, Please provide your airport codes?
Sure, I want to depart from ORD to IAD.
Ok, May I know your planned travelling dates?
And my departure and arrival dates are 05/08 and 05/10.
Ok, Give me a miniute.
Sure.
Thank you for your patience, We found a flight with a single connection in between the journey which does not  matches your requirement.
Ok, no issues.
Thank you for availing us, Have a good day.