I was recently watching Star Wars: A New Hope on DVD with my grandson. Biggs Darklighter spoke to Luke in the hangar bay and I was asked "Who is he, grandpa?"
I explained he's the one who was with the girl in the cafeteria on Tatooine, they were teasing Luke about being a farmboy. I got a puzzled look because it wasn't on DVD.
I dragged out my VHS player and put in my old shop-bought A New Hope videotape from the 1980's - no such scene.
I then searched and found another tape of it that I'd recorded from television many years ago - no such scene.
I mentioned this to a lifelong friend, we'd went to see A New Hope original run as teenagers in the 1970's. He looked puzzled and said he hadn't seen this scene.
It's like a reverse Mandela Effect, I know I saw this cafeteria scene. Was there ever a version of Episode IV that showed it?

– Toby Bartels Feb 03 '20 at 11:32In the original theatrical version that you saw as a teenager, that scene in the hangar bay wasn't there either; the only mention of Biggs's name is when he dies, and you have no idea why Luke cares about him. It was restored in the first (1997) Special Edition.
Besides the novelization and the comics, the other early place where all of the Biggs scenes, even the one on Tatooine, did appear, is the radio drama. So if you're more auditory than visual, maybe that's where you -saw- heard it.