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: @united horrible service. EWR. Not a cloud in the sky. Normal departure at 10am now leaving at 5pm. Crappy #UnitedAirlines
This tweet contains emotions: 
anger, disgust