In our rough script we have one of our characters trying to get the attention of his colleague in various ways and in the end makes and origami crane, it drifts over to her and ultimately he finally gets her attention.
I had a quick thought in regards to the whole origami crane sequence for our story. There's a legend about making 1000 origami cranes to make your wish come true (Senbazuru), so instead if it being one crane and getting picked up by a draft, maybe we could have origami cranes trickling down the conveyor belt to the girl? (We obviously won't do a thousand since that's a lot of work to do, but it would get the idea across?)
Here's a rough sketch of what I mean, and this would also make her finally look at the other character after all of his attempts?