Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture 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