Companion Care Needed - Full-time / Part-time

I need senior care provider with experience. Our care concerns are: Companionship. Basically, just make sure nobody falls and call 911 if needed. You can sit in livingroom and watch TV. This would be for both of my parents. They are both in their 80s. They both get around on their own. My father has Alzheimer's. Basically, you would just need to make sure nobody falls and call 911 if needed. You would not have to sit in room with them. Just keep an eye on them and listen for them.