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: @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