French phrase
Je reviens vers vous si besoin.
Meaning
I'll get back to you if needed.
When to use it
Shows an intention to contact someone again if needed. It is polite and restrained, often used to promise follow-up after checking or considering something.
Example dialogue
Je vérifie les chiffres. Je reviens vers vous si besoin.
I'll check the figures. I'll get back to you if needed.
Merci, c'est noté.
Thank you, I've noted that.