French phrase
Faites-moi signe si vous avez besoin.
Meaning
Let me know if you need help.
When to use it
Offers help when someone is having difficulty. Polite and friendly, often used with colleagues or friends.
Example dialogue
J'ai du mal avec mon projet.
I'm having trouble with my project.
Faites-moi signe si vous avez besoin.
Let me know if you need help.