You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Could you please book a ticket form BOS to HOU?

ASSISTANT: Sure, let me know your travel dates please?

USER: My travelling dates are on Dec 17 and Dec 19.

ASSISTANT: Do you need any other specifications?

USER: I need a direct flight.

ASSISTANT: May I know your name please to proceed further?

USER: My name is William Evans. Can you please book a economy class?

ASSISTANT: United Airlines is providing direct flight with the ticket fare of 100 and depart time is 20:00 PM, arrival time is 21:00 PM. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed by flight number 1018 and an economy class.

USER: Thank you.

ASSISTANT: Thanks for choosing us.