You need to provide 4 Northern Stew and a Jug of Wine from the cheese shop "One More Glass" in central Dalaran. The owner of the cheese shop, owes me the wine and you should find it somewhere around the shop.
Bring the wine and stews to Arille.
Where is my food, I will have conventioneers here any minute!
This is plenty of food for everyone! I am sure the customers will be pleased.