You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Ronald Carter. I am planning to watch sports live events in Detroit, can you help me in booking a flight ticket within a price limit of 500?

ASSISTANT: Sure, can I know your travelling dates?

USER: I will start on 12/26, return on 12/28.

ASSISTANT: Ok, please help me with origin and destination airport codes?

USER: My source and destination airport codes are DC - DCA, MI - DTW.

ASSISTANT: Delta airline is available with single connection and fare is 100. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket is booked with 1002 flight number in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.