search_flights
ChatGPTSearch one-way or round-trip flights and return an interactive carousel with prices, timings, and airline details. Constraints: adults+children+infants <= 9; infants <= adults. Optional cabinClass (Economy/PremiumEconomy/Business/First, default Economy). Optional filters: stops (0=non-stop, 1=one stop, ...), airlineName (substring, e.g. 'Delta Airline'), departureTimeSlot and returnDepartureTimeSlot (early_morning 12-4:59am, morning 5-11:59am, afternoon 12-5:59pm, evening 6-11:59pm; return only for round-trip).
