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: @BeeTuppy We're sorry to hear about the issues and how this is making you feel. We don't like to hear our customers being unhappy :-( We
This tweet contains emotions: 
sadness