Please stop

Q: You know what sucks?

A: "Can I help who's next?"

Attention! It's either: "May I help you?"

or "Who's next?"

or even, in a pinch, "Can I help whoever's next?" (to which a customer can mentally sneer "I dunno, can you?", but, still, it's better than nothing)

No wonder America is in so much trouble all the time.