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