{% set loop_messages = messages %}
{% for message in loop_messages %}
{% if loop.index0 == 0 %}{{ bos_token }}{% endif %}
<|start_header_id|>{{ message['role'] }}<|end_header_id|>

{{ message['content'] | trim }}<|eot_id|>
{%- endfor %}
{% if add_generation_prompt and (loop_messages | length == 0 or loop_messages[-1]['role'] != 'assistant') %}
<|start_header_id|>assistant<|end_header_id|>

{% endif %}