field force interview

I have most of my application finished (All I have to do is record my push-ups) and I keep reading on these forums about a field force representative interview. However, on the application portal, there is no space where it says field force interview, all the other categories have a red 'x' by...

My MALO recently contacted me to schedule a Field Force Interview at a local restaurant. He did not indicate the dress attire, so I was wondering if anyone on here could help me with it. Do I wear a suit or just something like a nice collared shirt and khakis?