My brother wanted me to buy a flute with him but I didn't accept  
afterwards I regretted it because he became sad.
my brother wanted me to buy a flute with him but i didnt accept  afterwards i regretted it because he became sad
[INST] In this task, you will be performing a classification exercise aimed at identifying the underlying emotion conveyed by a given sentence. The emotions to consider are as follows: Anger, Joy, Sadness, Guilt, Shame, Fear, or Disgust Sentence: My brother wanted me to buy a flute with him but I didn't accept  
afterwards I regretted it because he became sad. [/INST] sadness