Hello. I am William Thomas.
Hello, how may I help you?
I want to go for a round trip to Washington to DC-DCA.
Sure, can you please provide your travel dates?
 My travel dates are 04/16 and 04/18.
Do you have any connection limit?
 I need a direct flight.
Sorry, there is no direct flight found on your given details.
Thank you.
Thanks for choosing us.