You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Gregory Wright. Can you help me to book a flight ticket from DCA to ORD?

ASSISTANT: Ok, please can I know the dates of your journey?

USER: My travelling dates are 23 and 25 of Nov.

ASSISTANT: Ok, please can I know the specification you planned?

USER: I would like to depart in the afternoon with a connecting flight.

ASSISTANT: Ok, please may I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Ok, please can I know if your ok with the flight with a economy class flight and the airlines is Southwest?

USER: I am comfortable with any class.

ASSISTANT: Can I book?

USER: Please proceed to booking.

ASSISTANT: The flight ticket is booked and the airfare is 100. The flight number is 1011.

USER: Thanks for helping me.