디버깅
fli
Search Google Flights from the shell using the `fli` CLI. Use when the user asks about flights, airfare, flight search, cheapest day to fly, cheap flights, nonstop options, business/first class fares, travel between two cities or airports, scanning multiple dates or origins, or otherwise wants live flight pricing and schedules. Handles single-date searches (`fli flights`), flexible date-range / cheapest-day scans (`fli dates`), filtering by airline, stops, cabin, layover airport, departure window, bags, and emissions. Always prefer `--format json` so results can be parsed reliably.