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: #Sad I #missed #GDragon #tonight in #Seattle.Might be awhile before he's back, I hope everyone who attended the #concert had a #great #time!
This tweet contains emotions: 
joy, optimism, sadness