Hospitality workers will be certified as Blue Flag Ambassadors as part of a course designed to improve customer service to tourists.The five-week course is specifically designed for persons who have direct contact with visitors taxi drivers, retailers, tour operators and concierge personnel.The course starts Monday. Those who complete it will receive an engraved blue flag and a decal to display on their taxi or place of business.Admission is free.Register online at www.profilesofbermuda.bm or telephone 292-6997.