Hello. Myself George Lee.
Hello, how may I help you today?
I need to travel Wasington DC, can you please reserve flight ticket from DTW and DCA?
Sure, do you prefer a stopover in between your journey?
Yes, I need a connecting flight for my journey.
Could you please share your planned travel dates?
My travelling dates are Apr,25 and Apr,27.
Is there any class preference?
I don't need any class requirement.
Do you have any other preferences?
My depart time should be in the evening.
Ok, please wait for  a couple of minutes.
Sure.
Sorry, no flights are available as per your requirements.
That's ok, I will make alternate arrangements to reach my destination.
Ok.
Thank you for searching the flights.
Thank you for oping us.