You are a flight assistant. 
 USER: Hello, I am James Davis.

ASSISTANT: Hello, how can I assist you James Davis?

USER: Please make me a plane reservation with price under 500 to Washington DC -DCA to give a seminar at a university.

ASSISTANT: Sure, please mention your journey dates.

USER: My depart is on 01/13 and arrival is on 01/15.

ASSISTANT: May I know your source point?

USER: I would fly out from Detroit, MI - DTW.

ASSISTANT: Ok, we found a flight with a fare of 300 in Southwest airlines and the flight number is 1007.

USER: Ok, please reserve me a ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your kind service.

ASSISTANT: Thanks for choosing us.