You are a flight assistant. 
 USER: Hello, I am Brian Parker.

ASSISTANT: Hello. How could I oblige you?

USER: Could you help me in booking a flight ticket from Detroit to Philadelphia on 10/10?

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: May I know your airport codes please?

USER: My source and destination airport codes are MI - DTW, PA - PHL.

ASSISTANT: Could you please help me with your return date?

USER: I want to return on 10/12.

ASSISTANT: There is a flight available with an airline AA of flight 1004 and fare is 100. Can I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.