"Are you free on the weekend?"
The ひ sound in Japanese isn't necessarily a 1:1 map of "hi" (or "hee" I guess) in English. Maybe it just varies depending on the person, but I've noticed Japanese tends to put more emphasis on the "h" part of the sound. You bring your tongue up maybe a little further and restrict airflow more. Like halfway between a standard "h" and a hissing sound.
Except, you know, don't just start hissing at people.
/s/ is pronounced as [ɕ] (only equivalent in English is apparently sh in Ghanaian English ship, Swedish tj sound, like щ in Russian щи) before /i/, which can be hard for English speakers to distinguish from [ç] (like the h in hue or the ch in German ich), which is how /h/ is pronounced before /i/ and /j/. That's probably what's happening here.