Anything in Damier or Suhali would be great for an interview and would look great with the outfit you'll be wearing. IMO LV Mono might get too much attention or send a wrong signal, but it depends on what type of position you're applying for, of course. Good luck on your interview.
oh yeah i forgot the Suhali line ! i carried my Suhali L'Epanoui GM to my internship interview in the summer, and nobody could tell it was LV at all. someone just said, "nice bag," or something like that
Definitely Damier, a subtle epi (i.e. black, mocha, fawn, myrtille), or maybe even a Vernis in a neutral color like noisette or pearl. I personally find the hardware on the Suhali a little too flashy.
i assume you're a guy.... so go for something subtle like black Epi or Taiga. nothing too showy as some people have adverse reactions to logos or LV in particular. which might affect their impression of you.