French phrase
Je vous relance concernant ~.
Meaning
I am following up with you regarding ___.
When to use it
A polite follow-up about a delayed reply or action. It has a formal, businesslike tone and suits messages to clients or managers.
Example dialogue
Je vous relance concernant la facture du mois dernier.
I am following up with you regarding last month's invoice.
D'accord, je vous la transmets ce matin.
Okay, I will send it to you this morning.