Update app.py

app.py

@@ -154,7 +154,7 @@ llm = Llama(model_path=model_path,n_gpu_layers=GPU_LAYERS,max_new_tokens=256, co
 
 
 # Mistral formatter
-def format_prompt_mistral(message, history, system_message=system_message):
+def format_prompt_mistral(message, history, system_message=""):
     prompt = (
         "<s>[INST]" + system_message + "[/INST]" + system_understand_message + "</s>"
     )
@@ -165,7 +165,7 @@ def format_prompt_mistral(message, history, system_message=system_message):
     return prompt
     
 # Zephyr formatter
-def format_prompt_zephyr(message, history, system_message=system_message):
+def format_prompt_zephyr(message, history, system_message=""):
     prompt = (
         "<|system|>" + system_message  +  "</s>"
     )