I thought this game was supposed to be less Sierra, but I am stuck watching the cashier at the movie theater and cannot for the life of me figure what I am supposed to do.
Hey! There is no cashier in Tachyon Dreams III. You might be referring to Tachyon Dreams Anthology.
Spoilers ahead.
Have you talked to the attendant? Is his head floating? He says something about needing a kiss. You can't quite reach him because his head is in the air, but perhaps there is another way you can kiss someone from afar?