Task: Identify the emotional nuances in the tweet, classifying it as either 'neutral or no emotion' or as one or more of the designated emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that accurately reflect the expressed sentiment.
Tweet: @British_Airways They give awful service and you haven't got back to my complaint yet. Can you guess the airline? #dontflyBA #annoyed
This tweet contains emotions: 