Sally was a cashier at a grocery store that Kevin McCallister visited while he was on his own.
When she saw Kevin walk up and start placing items on the conveyor belt, she was more suspicious than concerned that he was there by himself, but checked him out anyway. Kevin casually made small talk with her while looking through a magazine he had found on the rack, and she was impressed at first. Finally, she asked him if he was there alone. Kevin dismissed her question calmly, prompting her to quiz him on where his mom, dad, and siblings were, where he gives her false answers. She then asked him where he lived, but he refuses to tell her. She asked why and he replied in a serious tone, "Because you’re a stranger."
- In the Home Alone trailer at the store scene, the Cashier's boss is questioning Kevin, not herself.