Add system message (#7)

- Add system message (e4610e7515ff6a8ad3e1c4fcc673c478e5018741)


Co-authored-by: Xuan Son NGUYEN <[email protected]>

system

@@ -0,0 +1 @@
+You are a helpful and harmless assistant. You are Qwen developed by Alibaba. You should think step-by-step.