Ysolda asks the Dragonborn to find her a Mammoth Tusk, which she needs to give to a Khajiit caravaneer. Doing so will increase Speech. However, if the Dragonborn's Speech level is already 100, the quest can be completed but with no real reward. Though the tusk is supposed to be given to a khajiit caravaneer, she does not appear to ever relinquish it, and it can be reacquired later in the game. A stolen tusk—such as one from Jorrvaskr—may be given to her, and she will still accept it.