Restaurant eating found flies, the first is to protect the scene, take photos as evidence. Then call the manager or boss to come. Called the waiter is not in charge, my approach is to let the restaurant returned to the dish, not counted in the dish money. Never let the hotel to redo, because redoing may be still this dish, take back to the kitchen to take away the flies and fried a little, re-end out only. More outrageous to add a little "material" to you will not pay for it, those who make a lot of noise said free of charge, I have not tried, other dishes are fine or to pay it. You let the hotel and then a discount or can.