si necesita algo

if you need anything

→ si
phrase Rare #39,732
if you need anything Polite phrase used when offering help, typically in the formal usted form.
SP: Llámeme si necesita algo.
EN: Call me if you need anything.

Si necesita algo, ya sabe.

If you need anything, you know where to find me.

— Hable con ella (2002)

Llámeme si necesita algo.

Call me if you need anything.

Si necesita algo, por favor llame primero.

If you need anything, please call first.

— El maquinista (2004)

Es la más cercana por si necesita algo.

It's the closest one in case you need anything.

Si necesita algo, éste es mi número.

If you need anything, this is my number.

— State and Main (2000)

Si necesita algo, hágamelo saber.

If you need anything, please let me know.

— Tropa de élite (2007)