This is for general supermarket shopping (Coles, Woolies, IGA) not JB, Big W, Officeworks etc.
Eg. You're browsing products for your weekly shop and a nearby employee engages you with a simple:
"Hi, How are you today?
Is there anything I can help you with?"
Regardless of whether or not you actually require assistance
Why would you need someone to help you make a purchase decision at woolies? It'd just be a waste of time.
When you go to a supermarket, you're there to buy the bare neccessities of living (food, toiletries) and it's very likely you know what you're going to buy and you're also most likely going to just buy whatever is on special price.