Improve error message & Add vicuna template (#57)

python/sglang/srt/conversation.py

@@ -388,3 +388,15 @@ register_conv_template(
         stop_str=["<|endoftext|>", "<|im_end|>"],
     )
 )
+
+register_conv_template(
+    Conversation(
+        name="vicuna_v1.1",
+        system_message="A chat between a curious user and an artificial intelligence assistant. "
+        "The assistant gives helpful, detailed, and polite answers to the user's questions.",
+        roles=("USER", "ASSISTANT"),
+        sep_style=SeparatorStyle.ADD_COLON_TWO,
+        sep=" ",
+        sep2="</s>",
+    )
+)