It would have to be early signs, because most people with the debilitating condition wouldn't be out shopping. Perhaps the staff will target people who are wandering about with no family to support them.
In the UK, an estimated 800,000 people have already been diagnosed with dementia, but experts expect this figure to soar to 1.7 million by 2051.
According to the Alzheimer's Society, one in three people aged over 65 will develop the condition, and two-thirds of sufferers are women. It's worrying that one third of the world population will decline.
The word dementia describes a set of symptoms that may include memory loss and difficulties with thinking, problem-solving or language. The condition is caused after brain damage from diseases, such as Alzheimer's disease or a series of strokes.
You might wonder about yourself or someone close to you. But don't worry about forgetting small details.
My husband (75 yrs) and I (72 yrs) do that at least once a day. We see a face on television and can't recall their name. Then, each races the other to see who can come up with the name first. I must admit, we're inclined to mentally go through the alphabet and wait for a name to pop up.
However, declining memory, especially short-term memory, is the most common early symptom of dementia. People with ordinary forgetfulness can still remember other facts associated with the thing they have forgotten. For example, during conversation they may forget their next-door neighbor's name but they still know the person. A dementia sufferer will not only forget their neighbor's name but also their past association.
I'll keep a careful watch on my husband and he'll do the same for me. But for all those people without a close family tie, it's good to know about support staff in major stores who are on the lookout in a caring society.