Workflow: model a workflow in n8n for Automation Triggered

{"meta": {"instanceId": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9"}, "nodes": [{"id": "939bb301-5e12-4d5b-9a56-61a61cca5f0d", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [640, 460], "parameters": {"model": "gpt-4o-mini", "options": {}}, "credentials": {"openAiApi": {"id": "8gccIjcuf3gvaoEr", "name": "OpenAi account"}}, "typeVersion": 1}, {"id": "372777e8-ce90-4dea-befc-ac1b2eb4729f", "name": "Window Buffer Memory", "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow", "position": [780, 460], "parameters": {}, "typeVersion": 1.2}, {"id": "7a8f0ad1-1c00-4043-b3e5-c88521140a1a", "name": "SerpAPI", "type": "@n8n/n8n-nodes-langchain.toolSerpApi", "position": [920, 460], "parameters": {"options": {}}, "credentials": {"serpApi": {"id": "aJCKjxx6U3K7ydDe", "name": "SerpAPI account"}}, "typeVersion": 1}, {"id": "a7624108-e3da-4193-a625-887314216b8b", "name": "When chat message received", "type": "@n8n/n8n-nodes-langchain.chatTrigger", "position": [360, 240], "webhookId": "53c136fe-3e77-4709-a143-fe82746dd8b6", "parameters": {"options": {}}, "typeVersion": 1.1}, {"id": "6b8b7de8-fe3f-43b5-97ce-a52a9e44eb5e", "name": "AI Agent", "type": "@n8n/n8n-nodes-langchain.agent", "position": [680, 240], "parameters": {"options": {}}, "typeVersion": 1.6}], "pinData": {}, "connections": {"SerpAPI": {"ai_tool": [[{"node": "AI Agent", "type": "ai_tool", "index": 0}]]}, "OpenAI Chat Model": {"ai_languageModel": [[{"node": "AI Agent", "type": "ai_languageModel", "index": 0}]]}, "Window Buffer Memory": {"ai_memory": [[{"node": "AI Agent", "type": "ai_memory", "index": 0}]]}, "When chat message received": {"main": [[{"node": "AI Agent", "type": "main", "index": 0}]]}}}