Update README.md

README.md

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 ```
 
-```yaml
-A chat between a curious user and an artificial intelligence assistant. The assistant gives helpful, 
-detailed, and polite answers to the user's questions. USER: Hi ASSISTANT: Hello.</s>
-USER: Who are you? ASSISTANT: I am WizardLM.</s>......
+### Prompt Format (Alpaca):
+```bash
+Below is an instruction that describes a task. Write a response that appropriately completes the request.
+
+### Instruction:
+{system}
+
+### Instruction:
+{prompt}
+### Response:
+{output}
 ```