{% if messages[0]['role'] == 'system' %}
[SYS]
{{ messages[0]['content'] | trim }}
[/SYS]

{% set loop_messages = messages[1:] %}
{% else %}
{% set loop_messages = messages %}
{% endif -%}
{%- for message in loop_messages %}
{% if message['role'] == 'user' %}
[Question]
{{ message['content'] | trim }}
[/Question]

{% elif message['role'] == 'assistant' %}
[Answer]
{{ message['content'] | trim }}
[/Answer]

{% endif %}
{% endfor -%}
{%- if add_generation_prompt and (loop_messages | length == 0 or loop_messages[-1]['role'] != 'assistant') %}
[Answer]
{% endif %}