French phrase
Je suis volontaire pour ~.
Meaning
I volunteer to ___.
When to use it
A proactive offer to take on a task. It suits organized or volunteer settings and can sound somewhat formal.
Example dialogue
On cherche quelqu'un pour s'occuper de la conférence ce soir.
We're looking for someone to take care of the conference tonight.
Je suis volontaire pour m'occuper de la conférence ce soir.
I volunteer to take care of the conference tonight.