(Capradio) - Dinner reservations might be hard to come by in downtown Sacramento over the next two nights. That's because thousands of wine professionals are in town for one of the industry's largest trade shows.The Unified Wine & Grape Symposium will attract nearly 12,000 wine professionals to the Sacramento Convention Center. Lyndie Boulton, Executive Director of the American Society for Enology and Viticulture, says there are many reasons why Sacramento has hosted the largest wine trade show in the Western Hemisphere for 18 years