wondered if my neighbor has dementia

today, she was doing laundry and when she was going to take the elevator to her apt, she was saying stuff like wheres the elevator? it was right where she was near the washer and dryer but she was walking the halls looking for it, I told her where it was, this was the same person that ran over my foot with her scooter which makes me wonder if she forgot to look down before she started moving it. she also drives a car, which makes me wonder if she should since she couldn't even find the elevator and its not like she moved in yesterday either. thought of telling my service coordinator about it. is someone cant even find an elevator when they live there do they have some kind of dementia and who should I tell about it, if anyone?