I've read the essay, but not sure if you are supposed to give your own opinion or decide whether she herself thinks some sights might not be so rewarding? If it's the second idea, I can't think of anything where she expects to be disappointed, can you? So it's probably about your opinion. If you get a chance, I would check with your teacher, but if not, then the best way is maybe to go through the things which you imagine could disappoint her. Examples could include the city buildings and the people going - by - eg she seems to imagine everything and everyone is clean, rich and happy, so there might be some surprises. Also, her friend may not look the way she imagined them!