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: Shame the cashback @mbna @AmexUK credit card comes to an end. I used to look forward to that end of year bonus. Sad really. #cashback
This tweet contains emotions: 
disgust, sadness