You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from BOS to ORD, can you help me?

ASSISTANT: Sure, could you please help me with your travelling dates?

USER: My travel dates are Dec 21 and 23.

ASSISTANT: Do you need any class preference?

USER: No.

ASSISTANT: Do you prefer a connecting flight or direct flight?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name, please?

USER: I am Virginia Roberts.

ASSISTANT: There is a flight of American airline, flight number 1019 with the fare of 200. Can I proceed?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.