You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I want to visit Atlanta, GA-ATL.Can you please help me out?

ASSISTANT: Sure, can I know your name please?

USER: My name is Charles Mitchell.

ASSISTANT: May I know your travel dates please?

USER: The travel dates are from 11/08 to 11/10.

ASSISTANT: Can you provide the take off code please?

USER: The source code is from MI-DTW.

ASSISTANT: There is a flight for you in Delta airline. Shall I book it?

USER: Ok, proceed with my booking.

ASSISTANT: Your ticket has been booked with flight number 1009.

USER: Thank you for your service.

ASSISTANT: You are welcome.