School of Mall?

I had found a set of automatic sliding doors (The type that is the entrance to most stores) in front of me. When I stepped inside, the doors opened into enormous room/area. It was huge. The floor and walls were gray, with the floor made of a thin carpet that had different stripes of gray. There were dozens of elevators, each shaped like a tube that was clear. There would be this platform that you step on, and then it would take were you would need to go.

(At this point, I seem to have teleported with a time skip)

I'm in a line, following a small number of students (people my age?) dressed in a white button-down shirt, a gray blazer, a red and blue tie, and skirts or pants depending on if the student was male or female. I was holding a brown notebook.

We were in a narrow hallway, very narrow compared to the open area that I had first encountered, and again, the walls, ceiling and floor were gray. The only difference was that the place where the floor met the walls had a white trim (It looked exactly like the ones that I have in my house). We were following the instructor; I had no idea who it was because I never got a good look. After a minute of walking, we exited the hallway into a bigger area. I saw a railing around a spherical mystery object covered by a tattered old plastic sheet. We walked around it and then I had thought, 'Culinary arts'. As we walked, we passed by a potted plant. The instructor said, "This is made from chocolate." When I walked by the plant, I had scrutinized it and for some random reason, a dress image popped up in my brain.

(Another teleportation and time skip?)

I was in an elevator, like the one I had described before. This time, I was going down. I was the only one in the elevator, holding the brown notebook. When I exited the elevator, I was rushed off by something that vaguely resembled a person. Then I walked to someplace and ended up walking around and around in a circle in frenzy, with the words 'Fashion Design' just running along with the sense of being hurried.

(Not sure if this next part is a part of the same dream, but I think so)

I'm running down this spaceship looking hallway. This hallway has white floor lights with a red-light trim running on the side and the ceiling. It gave off this cool effect, and the light was just enough so that some of the hallway was still dark. I entered a room, and it appeared to be a lab, with many different chemicals and beakers everywhere. Some splattered on the floor and the counters were completely covered with them. A dude in a yellowed white lab coat appeared told me, "We need a cake!" In a frustrated voice. This prompted me to hurry about, mixing things and more running in the hallways. In the end, the cake was delivered to a little girl's birthday party. There were balloons, the cake, presents in gift bags, and food. The birthday girl was happy, and the lab man was less frustrated.

(At this point, I woke up)

Note: I don't remember the exact wording of the dialogue, so they're somewhat close.