You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Garcia here.

ASSISTANT: David, how can I aid you today?

USER: I want to book a flight ticket from IL - ORD to MI - DTW. Could you please help me in booking a flight ticket?

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

USER: My travel dates are from 03/05 to 03/07.

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

USER: Sure.

ASSISTANT: I found a flight for you with Spirit airline and it costs you 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with 1023 flight number.

USER: Thank you for booking.

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