Tell me the city/country (or multiple stops) and your travel start date and end date so I can map a sensible route and check opening hours for attractions on the correct dates.
List your top interests (history, food, hiking, museums, shopping, beaches, nightlife) and any absolute must-see sights so I can prioritize them in the plan.
Give a rough daily budget (low/mid/high) and preferred accommodation type (hotel, B&B, apartment, boutique) to tailor restaurant and lodging recommendations.
Mention any dietary restrictions, accessibility needs, or mobility limits so I can recommend suitable restaurants, activity difficulty levels, and transit options.
Tell me how you'll arrive (flight, train, car) and whether you prefer public transit, private transfers, or driving so the route and timing are realistic.