Updated prompt template as confirmed by Intel staff

Ref: https://huggingface.co/Intel/neural-chat-7b-v3-1/discussions/1


README.md

@@ -69,10 +69,17 @@ Here is an incomplete list of clients and libraries that are known to support GG
 <!-- repositories-available end -->
 
 <!-- prompt-template start -->
-## Prompt template: Unknown
+## Prompt template:
+ref: https://huggingface.co/Intel/neural-chat-7b-v3-1/discussions/1#655533a4bc6ff300d447f85d
 
 ```
-{prompt}
+### System:
+{system_prompt}
+
+### User:
+{user_prompt}
+
+### Assistant:
 
 ```