Update the banner and the training data description

README.md

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 ## Model Overview
 
-torchlight is a small model that helps with PyTorch questions. It is [Phi-4-mini-instruct](https://huggingface.co/microsoft/Phi-4-mini-instruct) (3.8B parameters), fine-tuned on 6,918 questions from the [PyTorch forums](https://discuss.pytorch.org). Each question is paired with the answer that solved it.
+torchlight is a small model that helps with PyTorch questions. It is [Phi-4-mini-instruct](https://huggingface.co/microsoft/Phi-4-mini-instruct) (3.8B parameters), fine-tuned on 6,918 chats from the [PyTorch forums](https://discuss.pytorch.org). Most end with the answer that solved the thread; the rest teach it to ask for missing details.
 
 It was trained not to guess: when a question has enough detail, suggest a fix; when it doesn't, ask for the code or the full error.