It never hurts to ask. For all you know they've had a role in mind for you but don't want to risk making such a suggestion. You don't have to threaten: I want

It never hurts to ask. For all you know they've had a role in mind for you but don't want to risk making such a suggestion. You don't have to threaten: I want this and this or I leave. The point is, if you're prepared to leave if necessary, you lose nothing by asking. p.s. Unpaid leave is expected. That said, it could work to your favor in the sense they don't want to lose you.