php helpdesk3 ai agent2 chatbot2 chatgpt2 helpdesk2 livechat2 openai2 php livechat2 support2 tickets2 activity log1 canned responses1 chat1 chatgtp support1 customer portal1 customer support1 dynamic pages1 faq system1 knowledge base1 live chat1 livechat embed1 livechat widget1 messenger1 php support script1 role based access1 star rating1 support ticket system1 ticketing system1 user management1