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: Will give #sleepnumber another chance for customer service. Today's growl is 15+ minutes on hold. Overall bed + service = very unimpressive.
This tweet contains emotions: 
anger, disgust