I was wondering if it's possible to make a same-day reservation on a weekday afternoon.

I suddenly have some free time today, so I'd like to go get some treatment, even if it's late in the afternoon. Are same-day appointments usually full? I feel like the times are vague~~ Would it be fastest to call the branch directly? Or would it be better to ask via KakaoTalk? Maypure is always crowded, so I think it'd be hard to go if I don't make a reservation in advance. Haha. I'll wait for your reply!!