One of the advantages of getting older is you can actually say, "I'm sorry, I'm old, I know the face but not the name. You are?" and lean closer to see what they will do physically. Ahh, the lack of youth.
Nozomi didn't say she didn't remember her name.
I'm pretty sure "Heeeeey" isn't a name.
Sorry, I meant that I couldn't decide how to greet her, but forgetting names is also TERRIBLE. Your ABC-tactic works though! But only after the person has long left (I usually remember when I'm in bed) and after a painfully awkward conversation!!! I can't wait till I'm older...