ok, well, that happened to my friend once and we complained to the waiter and he said, "that means you're going to go to a party and have a good time." and we said "no! no! we need another cookie!" (being drunk teenagers) so he gave us another cookie and she opened it and it said, "you will attend a festive party". (he probably had a box of those just for drunk teenagers)
It means you have no future, so enjoy your last meal.
the Chinese Peking Fortune Cookie Company needs to have better quality control.
It means you get another fortune cookie.