For women, either a dress that does not show too much with sandals or dress pants, dress shirt and sandals.
This does not matter.
When attending any interview, always dress professionally or at least polished.
Business casual clothe.
I wore a nice top and nice pants, you don't necessarily have to get super dressed up but make an effort. Show that your taking this seriously.
Formal clothes are recommended but not a necessity
Wear something professional but casual. Dress pants and a nice shirt, hair nicely fixed. Make sure to shake hands!