Why would you try to relight the engine without a detailed analysis of WHY it failed? If it's spooled down due to large fuel leak in the engine/pylon there's nothing in ECAM that will say "Pipe Detached......Check for Spray".........but that's exactly what I'd do before even contemplating a restart.
And if it restarts, are you going to be confident that it'll continue to run
Secure it. Land. End of.