The cultist will say: 'Your lies fall on deaf ears, Deceiver. There, you will be approached by some weird people with masks, these are the 'Cultists of Miraak': One of the cultists will ask you: 'You there! You're the one they call Dragonborn?' Your dialog options are: (might vary whether you have killed Alduin or not) Yes, I am Dragonborn The Greybeards seem to think so I don't know what you're talking about Choose the first option and tell them you are the Dragonborn. After you have installed Skyrim Dragonborn, load the game and head to any major city, for example Riften.
