You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I would like to book a ticket from DFW to MCO. Can you please help me out?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to travel on Dec 19 and return back on Dec 21.

ASSISTANT: Ok, do you have any specifications?

USER: Yes, My depart time is afternoon.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: I am looking for a economy class flight and I need a direct flight.

ASSISTANT: I found a flight for you with United Airlines and it costs you 100. Shall I proceed to reserve a seat in this direct flight?

USER: That's fine, please proceed the booking.

ASSISTANT: On whose name you would like to book this ticket?

USER: My name is Anna Martin.

ASSISTANT: Your ticket has been booked with 1003 flight number Anna Martin.

USER: Thank you for your service.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.