Update mlc-chat-config.json

mlc-chat-config.json

@@ -10,6 +10,29 @@
     "num_shards": 1,
     "use_presharded_weights": false,
     "shift_fill_factor": 0.3,
+  "conv_config": {
+      "seps": [
+        " "
+      ],
+      "stop_tokens": [
+        2
+      ],
+      "offset": 0,
+      "messages": [
+  
+        
+      ],
+      "stop_str": "</s>",
+      "roles": [
+        "<|user|>",
+        "<|assistant|>"
+      ],
+      "role_msg_sep": " ",
+      "role_empty_sep": " ",
+      "system": "<|system|> A chat between a curious user and an artificial intelligence research data management assistant. The assistant gives helpful, detailed, and polite answers to the user's questions. [/INST]",
+      "add_bos": true,
+      "name": "Llama2"
+     },
     "tokenizer_files": [
         "tokenizer.json",
         "added_tokens.json",