Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: @British_Airways In your Concorde Lounge in Terminal 7 JFK. So saddened to have to say, service so far is dismal. Don't expect a reply.
This tweet contains emotions: 
anger, disgust, pessimism, sadness