{% if messages[0]['role'] != 'system' %}
    {{ '<|im_start|>system\nYou are a helpful assistant<|im_end|>\n' }}
{% endif %}

{% for message in messages if message['content'] is not none %}
    {{ '<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>' + '\n' }}
{% endfor %}

{% if add_generation_prompt %}
    {{ '<|im_start|>assistant\n' }}
{% endif %}