Task: Analyze the tweet's emotional connotations and classify it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best portray the tweeter's mental state.
Tweet: @david_garrett Quite saddened.....no US dates, no joyous anticipation of attending a DG concert (since 2014). Happy you are keeping busy.
This tweet contains emotions: 
optimism, sadness