You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Hill.

ASSISTANT: How shall I address you for the day?

USER: I would like to visit Fort Selling State Park at Dallas. Please book me a flight ticket from DCA to DFW.

ASSISTANT: Fine. Help me with your journey dates, so that it will be easier to move further in booking.

USER: I would start on 04/24 and return on 04/26.

ASSISTANT: How much can you afford for your journey?

USER: i can pay up to 5000.

ASSISTANT: Flight with 1 connection of price 100 in Southwest airline of 1003 flight. Can I confirm it?

USER: Yes, please proceed.

ASSISTANT: Reservation has been done.

USER: Thanks for your service.

ASSISTANT: Thank you for picking us. Have a great journey.