Update chat_template.jinja

chat_template.jinja

@@ -1 +1 @@
-{% for message in messages %}<|im_start|>{{ message['role'] }}<|im_sep|>{{ message['content'] }}<|im_end|>{% endfor %}{% if add_generation_prompt %}<|im_start|>assistant<|im_sep|>{% endif %}
+{% set default_system = "Your name is BrtGPT and you are a LLM model, developed by BrtAI, respond helpfull and harmless to the questions." %}{% set ns = namespace(all_system_parts=[]) %}{% if system_message %}{% set ns.all_system_parts = ns.all_system_parts + [system_message] %}{% endif %}{% for message in messages %}{% if message['role'] == 'system' %}{% set ns.all_system_parts = ns.all_system_parts + [message['content']] %}{% endif %}{% endfor %}{% if ns.all_system_parts %}{% set combined_system = ns.all_system_parts | join(' ') + ' ' + default_system %}{% else %}{% set combined_system = default_system %}{% endif %}<|im_start|>system<|im_sep|>{{ combined_system }}<|im_end|>{% for message in messages %}{% if message['role'] != 'system' %}<|im_start|>{{ message['role'] }}<|im_sep|>{{ message['content'] }}<|im_end|>{% endif %}{% endfor %}{% if add_generation_prompt %}<|im_start|>assistant<|im_sep|>{% endif %}