Anyways, yeah. Gotta do a pamphlet featuring a destination and it all has to be in French. Gosh it's hard .__.
More or less.
Si = If
Il = It (Because the "it" is unknown at this point, masculine form is used)
Te = You
Plait = Pleases
If it was "if you please," it would be "Si tu plais." Verb form is a big hint here that it's a reflection of "Il" - meaning "It" - and not "Tu." In fact, if it was written "S'il-te plais," it wouldn't make sense.
On a side-note, just saying "Si tu plais" doesn't make sense without a context.