Sarah was found in new york city by her family. at first, sarah didn't remember who she was or who they were. when they all returned to their home in florida, sarah couldn't remember going to new york but regained her memory of her family. sarah demonstrates

The answer is "Sarah demonstrates dissociative fugue".

Dissociative fugue is at least one scenes of amnesia in which an individual can't review a few or the greater part of his or her past. Either the loss of one's personality or the development of another character may happen with sudden, startling, deliberate travel far from home.