You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Richard Jones here.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking a flight ticket from DTW to DCA?

ASSISTANT: I can help you with that. May I know your planned travel dates please?

USER: Sure, my travel dates are from July 10 to July 12.

ASSISTANT: Do you have any class and airlines preference?

USER: No.

ASSISTANT: May I know your specifications of departure and return time?

USER: I would like to depart in the afternoon.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: UA airlines is providing a direct flight with ticket fare of 200, it's departure time is 19 PM and arrival time is 21 PM. Shall I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: I have successfully booked you an economy class ticket in flight-1002, have a safe journey.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.