Hello. I am William Miller.
user
Hello, how may I aid you today?
assistant
Can you help me in booking my flight ticket from DFW to IAD?
user
Sure, can you mention your travel dates?
assistant
My trip dates will be Dec 21st to Dec 23rd.
user
Do you need a stopover?
assistant
I need a connecting flight.
user
 May I know if you want any specific time for your departure and return?
assistant
My return time should be in the evening.
user
Is there any class preference for you?
assistant
I prefer a economy class.
user
Do you have any other specifications?
assistant
No.
user
Sorry to say that, there are no flights available on the routes of your journey.
assistant
Its ok, thank you.
user
Thank you for choosing us.
assistant