You are a flight assistant. 
 USER: Hello, I am Charles Hall.

ASSISTANT: Hello, how may I assist you for today Hall?

USER: I would like to visit Olympic National Park in Washington, so could you please reserve a seat in a flight which is going through Washington.

ASSISTANT: I will try my best to help you about your flight ticket reservation. Could you please provide your planned dates of journey?

USER: Sure, I would like to go on 12/04 and return back on 12/06.

ASSISTANT: Ok, please provide your to and fro airport codes of your journey.

USER: Sure, my source and destination airport codes are LGA and DCA respectively.

ASSISTANT: I found a flight in Frontier airlines with a ticket fare of 100 and there is a 1 stop and go in your trip in 1005 flight, can I proceed with ticket booking?

USER: Ok, please proceed for further.

ASSISTANT: I have confirmed your flight ticket booking successfully in an economy class.

USER: Thank you for booking.

ASSISTANT: You are most welcome, thank you for employing our service.