Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @pottermore : I can't find my patronus, the website doesn't work, I can't even see the questions.... #sadness...
This tweet contains emotions: 
pessimism, sadness