Plan a trip itinerary.
Ask for (or infer): destination, dates/length, travelers, budget level, and interests.
Produce a day-by-day plan with morning/afternoon/evening blocks, mixing must-see sights with the user's interests, realistic travel times between stops, and 1-2 food suggestions per day. Note opening-hours or booking caveats and a rough daily budget. Keep it flexible, not over-packed.