LLM Customer Service: Intelligent Chat Support and Meeting Scheduling

This workflow automates customer support conversations, replacing manual chat handling and ticket routing that overwhelm teams. The Chat Trigger LangChain node manages incoming messages with session persistence, the Input Validator If node checks format, the Session Manager Set node tracks metadata, the Safety Validator If node ensures content safety, and the AI Agent LangChain node uses OpenAI's GPT-4o for intelligent replies. Tools like Google Calendar Checker and Meeting Scheduler enable scheduling, Knowledge Search Tool retrieves info, and Memory Buffer maintains context. Error handlers (If/Set nodes) provide fallbacks, Conversation Logger Set node logs interactions, and Response Validator If node ensures quality before the final response. It helps support teams in small to mid-sized businesses (10-50 staff) managing 200+ daily queries, enabling 24/7 responses and lead qualification without extra agents, reducing wait times and improving satisfaction.\n\nThis workflow saves 10-15 hours weekly handling 300 queries, boosting resolution rates by 70%. Use cases include e-commerce support, SaaS troubleshooting, and sales qualification for tech firms. Suitable for growing companies. Requires OpenAI API ($0.03/1k tokens), Google Calendar API (free with Workspace), n8n (free self-hosted or $20/month cloud). Scalable to 1,000 queries/day with paid OpenAI tiers.\n\nInstall n8n via n8n.io or cloud.n8n.io. Get OpenAI API key at platform.openai.com (enable billing). For Google Calendar, enable API at console.cloud.google.com, create OAuth credentials, store as GOOGLE_CALENDAR_CREDENTIALS. Import JSON, configure Chat Trigger LangChain node with webhook path 'ai-agent.' Set webhook URL: https://your-n8n-instance/webhook/ai-agent. Add OPENAI_API_KEY environment variable in n8n settings.\n\nTest with Postman POST to webhook: {chatInput: 'How do I set up workflows?'} Verify responses, session continuity. Common errors: invalid OpenAI key (regenerate at platform.openai.com), rate limits (upgrade plan), empty messages (add validation). Activate workflow in n8n dashboard. Monitor executions weekly, refresh tokens quarterly, optimize by adjusting temperature for concise replies.", "businessValue": "Saves 10-15 hours/week handling 300 support queries", "setupTime": "30-45 minutes", "difficulty": "Intermediate", "requirements": ["OpenAI API ($0.03/1k tokens)", "Google Calendar API (free with Workspace)", "n8n instance"], "useCase": "Automated AI chat for customer support and lead qualification"