You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, can you please share your travelling dates?

USER: I would like to travel on Dec 28 and return on Dec 30.

ASSISTANT: Do you have class preference?

USER: No, I am comfortable with any of the class.

ASSISTANT: Do you need connection limit?

USER: I would prefer connecting flight.

ASSISTANT: May I know your name?

USER: Myself Samuel Wilson.

ASSISTANT: We found 1025 Delta Airlines with single connection and price of 200, shall I proceed with booking?

USER: Please, proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking the flight ticket.

ASSISTANT: Thank you for reaching us.