You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please book a flight ticket from DCA to DFW?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are Dec 08 and Dec 10.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer a normal cost airline.

ASSISTANT: May I know your good name?

USER: I am Justin Green.

ASSISTANT: We found an airline: Delta Airlines, flight number: 1017 and price is 200 with one connection.

USER: Please proceed with my booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.