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: Dear everyone at HSSU, stop walking with your phones up so I can smile and wave at you and you can smile and wave back :(
This tweet contains emotions: 
sadness