By Anne D’Innocenzio, The Associated Press LAS VEGAS — What if your room on a cruise ship were to unlock automatically as you approach, or if the wait staff could bring your favorite cocktail before you even ask? Carnival Corp., the operator of such cruise lines as Princess, Holland America and Carnival, wants to make that happen so it can get cozier with its guests and make cruises even more personalized. Carnival is using the CES gadget show in Las Vegas on Wednesday to unveil new concierge technology designed to help crew members anticipate and respond to passengers’ needs.