A user wants a language model to categorize customer feedback into one of three categories: 'Positive', 'Negative', or 'Neutral'. They provide the model with the following text:

Input: The checkout process was confusing and took too long.

The model's responses are inconsistent, sometimes generating a long paragraph instead of a single category label. Based on the typical structure of an effective instruction-based prompt, identify two key components that are missing and explain how their absence causes the inconsistent output.