system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Group the following words into two categories, 'positive' or 'negative' based on the sentiment: efficient, helpful, slow, horrible, fantastic, disappointing, confusing, lovely, excellent.


assistant
These words are generally considered to have positive sentiment: lovely, fantastic, excellent, efficient, helpful. 

While these words are considered negative: horrible, disappointing, slow, confusing.