In my DIY solutions to the challenges of my older relatives, I often use a “Button” to trigger an Alexa Routine. It keeps things simple, and avoids them needing to remember a specific “phrase” to speak. However, it is not so easy to find the right button. This solution explains the options, and which buttons I prefer.
This solution notes when a person with dementia gets out of bed, and can guide the person to the bathroom, remind them to return to bed if they stay up longer than desired, and alert a caregiver if they stay up too long, but avoid unnecessary alerts if the activity is within parameters set by the caregiver.