Hi.
Hello, how may I help you today?
Can you please help me in booking my ticket from DFW to IAD?
Sure, can I know your good name please?
Sure, my name is Justin Collins.
 When you are willing to travel?
Sure, my willing to travel dates are from Jan, 16 to Jan, 18.
Do you need direct flight or connecting flight?
Yes, I need a connecting flight.
 Is there any other specifications?
Yes, I want to depart at evening time.
Sorry to say that, there are no flights available on the routes of your journey.
Ok, no problem. Anyways, thank you for your service.
Thank you for opting us.