You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, In what way can I assist you now?

USER: I want to book a ticket from SEA to DCA. Could you book a ticket?

ASSISTANT: Sure, can I know your good name please?

USER: I am Jack Martinez.

ASSISTANT:  When you are willing to travel?

USER: Depart date is June, 12 and return by June, 14.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I would prefer connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer economy class.

ASSISTANT: There is a connecting flight 1009 in United Airlines at the price of 200 with economy class. Can I proceed?

USER: Please book a flight.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.