{%- if messages[0]['role'] == 'system' %}
    {%- set loop_messages = messages[1:] %}
    {{- '<|im_start|>system\n' + messages[0]['content'] + '<|im_end|>\n' }}
{%- else %}
    {%- set loop_messages = messages %}
    {{- '<|im_start|>system\n' + "You are a knowledgeable assistant. For multiple-choice questions, write ONLY the letter of the correct answer inside \\boxed{}." + '<|im_end|>\n' }}
{%- endif %}
{%- for message in loop_messages %}
    {{- '<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>\n' }}
{%- endfor %}
{%- if add_generation_prompt %}
    {{- '<|im_start|>assistant\n' }}
{%- endif %}