{%- set counter = namespace(index=0) -%}
{%- if not tools is defined %}
    {%- set tools = none %}
{%- endif %}

{%- if messages and messages[0]['role'] == 'system' %}
    {%- set system_message = messages[0]['content']|trim %}
    {%- set messages = messages[1:] %}
{%- else %}
    {%- set system_message = "You are a helpful assistant." %}
{%- endif %}

{%- if tools is not none %}
    {%- set tool_instruction %}
You have access to the following tools. When you need to call a tool, you MUST use the following format:

<tool_call>function_name
<arg_key>parameter_name</arg_key>
<arg_value>parameter_value</arg_value>
</tool_call>

Important rules:
- Always wrap tool calls with <tool_call>...</tool_call> tags
- Put the function name on the first line after <tool_call>
- Use <arg_key> and <arg_value> tags for each parameter
- If a parameter value is a string, keep it as-is. If it's a number or boolean, convert it appropriately
- You can make multiple tool calls if needed
- If no tool is suitable, respond with regular text

Available tools:
{% endset %}
    {{- tool_instruction + "\n\n" }}
    {%- for t in tools %}
        {{- t | tojson(indent=4) }}
        {{- "\n\n" }}
    {%- endfor %}
{%- endif %}

{%- for message in messages -%}
    {%- if message['role'] == 'user' -%}
        {{- '[Round ' + counter.index|string + ']\n问：' + message['content'] -}}
        {%- set counter.index = counter.index + 1 -%}
    {%- endif -%}
    {%- if message['role'] == 'assistant' -%}
        {{- '\n答：' + message['content'] -}}
        {%- if (loop.last and add_generation_prompt) or not loop.last -%}
            {{- '\n' -}}
        {%- endif -%}
    {%- endif -%}
{%- endfor -%}

{%- if add_generation_prompt and messages[-1]['role'] != 'assistant' -%}
    {{- '\n答：' -}}
{%- endif -%}