Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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