Helper who can take care a 76 years old elderly

Looking for a domestic helper which can speak a little bit Cantonese (at least can listen basic words) to take care a 76 years old elderly. The elderly has light level of dementia but still able to talk care of herself. Helper is required to take care of her closely, do all the housework and cook for her. Worker would work in a 400sq.ft room, sleep with the elderly, salary would be HKD5000-6000 depends on experience. Weekly holiday can be discussed.