instruction_template: |-
  {%- if messages[0]['role'] == 'system' %}
      {%- set system_message = messages[0]['content'] %}
      {%- set loop_messages = messages[1:] %}
  {%- else %}
      {%- set loop_messages = messages %}
  {%- endif %}
  
  {{- bos_token }}
  {%- for message in loop_messages %}
      {%- if (message['role'] == 'user') != (loop.index0 % 2 == 0) %}
          {{- raise_exception('After the optional system message, conversation roles must alternate user/assistant/user/assistant/...') }}
      {%- endif %}
      {%- if message['role'] == 'user' %}
          {%- if loop.first and system_message is defined %}
              {{- ' [INST] ' + system_message + '\\n\\n' + message['content'] + ' [/INST]' }}
          {%- else %}
              {{- ' [INST] ' + message['content'] + ' [/INST]' }}
          {%- endif %}
      {%- elif message['role'] == 'assistant' %}
          {{- ' ' + message['content'] + '</s>'}}
      {%- else %}
          {{- raise_exception('Only user and assistant roles are supported, with the exception of an initial optional system message!') }}
      {%- endif %}
  {%- endfor %}