Fry's Grocery Store

I went to the grocery store last night. I was looking for the new chips by Flat Earth. 

I didn't find them, but I got the rest of my list. 

Not a big deal.

When I got to the register the cashier asked if I'd found everything I wanted. Now normally you just say yes and go on.

But today I REALLY wanted the chips and had looked in both the snack section and the health section.

So I said no, and told her what I was looking for.

She just looked at me and said "oh, yeah we have those. I've seen them"

Full stop.

Now since I've never answered the question with anything other than "yes I found everything thanks" before....

Am I out of line thinking that maybe she could have been a bit more helpful?

Or is this the grocery equivalent of  "how's your health?"