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: @yap_yip --an uncertainty. [Halsey teases, her lips curving into a jovial smirk.]
This tweet contains emotions: 
joy, optimism