You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to travel from ORD to IAD, could you book my flight ticket?

ASSISTANT: Sure, may I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Let me know your travelling dates.

USER: My trip dates are July 29 and July 31.

ASSISTANT: Do you have any other requirements?

USER: I prefer economy class.

ASSISTANT: May I know your name please?

USER: Paul Jackson here.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a Southwest airline, flight number: 1003, price: 300 with one connection.

USER: Book my ticket.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.