You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Phillips.

ASSISTANT: How may I help you?

USER: I would like to book a flight ticket to Detroit to attend a workshop, can you please book me a flight ticket within price 500?

ASSISTANT: Sure, may I know your trip dates?

USER: I want to go on 11/15 and return back on 11/17.

ASSISTANT: Help me with the airport codes?

USER: I want to fly from DFW to DTW.

ASSISTANT: We found a flight in an airline UA with number 1013 price of 100 having a direct flight. Shall I reserve?

USER: Usually I prefer a connecting flight but for this time you can book the direct flight.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.