Determine the emotional tone of the following 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!". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".