AN appeal for help to find a dog which escaped from a cage at Kai Tak airport has led to several calls reporting possible sightings. Balloute, a one-year-old, white, medium-sized mongrel, went missing just before she was to be loaded onto an Air France flight to Paris last Friday. Her owner, who flew back from France to search for her, has asked the public to help. Yesterday a woman reported seeing a man walking a similar dog in Kowloon City and another sighting located a dog which looked like Balloute on a busy carriageway near the airport, but tracing the dog proved fruitless. Anyone who can help should telephone 736-0820 or 818-2604.