Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: @flybe Doesn't explain the ability to land at Manchester but not Bradford - other than more convenient for Flybe. Many unhappy travelers
This tweet contains emotions: 
pessimism, sadness