Boy, today is your lucky day, indeed. A chance to redeem yourself partially for prior mistakes.
Your instructions are thus:
You are to collect young Master Snape from the following address in HOGSMEADE. You are to bring young Master Snape to the SeaCave on the coast, where my brother graciously grew the inferi for many days. You are to leave young Master Snape in the cave, where you assisted his Lord Voldemort, Glory be His Name, in burying his Precious Locket, and seal him in.
You have 24 hours to complete this task.