Workflow: build automation using n8n for Send Triggered

{"meta": {"instanceId": "408f9fb9940c3cb18ffdef0e0150fe342d6e655c3a9fac21f0f644e8bedabcd9", "templateCredsSetupCompleted": true}, "nodes": [{"id": "ef4c6982-f746-4d48-944b-449f8bdbb69f", "name": "When chat message received", "type": "@n8n/n8n-nodes-langchain.chatTrigger", "position": [-180, -380], "webhookId": "53c136fe-3e77-4709-a143-fe82746dd8b6", "parameters": {"options": {}}, "typeVersion": 1.1}, {"id": "e6183978-5077-4252-9718-6b36b6a7cd74", "name": "Simple Memory", "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow", "position": [160, -160], "parameters": {}, "typeVersion": 1.3}, {"id": "1719e956-f9c8-48f5-9744-ee62345a9f7d", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [20, -160], "parameters": {"model": {"__rl": true, "mode": "list", "value": "gpt-4o-mini"}, "options": {}}, "credentials": {"openAiApi": {"id": "8gccIjcuf3gvaoEr", "name": "OpenAi account"}}, "typeVersion": 1.2}, {"id": "f0815af7-da61-4863-9cfa-b35be836b59c", "name": "SerpAPI", "type": "@n8n/n8n-nodes-langchain.toolSerpApi", "position": [300, -160], "parameters": {"options": {}}, "credentials": {"serpApi": {"id": "aJCKjxx6U3K7ydDe", "name": "SerpAPI account"}}, "typeVersion": 1}, {"id": "2d3b4012-bd5f-46d5-be6d-af1ede6c155b", "name": "AI Agent", "type": "@n8n/n8n-nodes-langchain.agent", "position": [60, -380], "parameters": {"options": {}}, "typeVersion": 1.8}], "pinData": {}, "connections": {"SerpAPI": {"ai_tool": [[{"node": "AI Agent", "type": "ai_tool", "index": 0}]]}, "Simple Memory": {"ai_memory": [[{"node": "AI Agent", "type": "ai_memory", "index": 0}]]}, "OpenAI Chat Model": {"ai_languageModel": [[{"node": "AI Agent", "type": "ai_languageModel", "index": 0}]]}, "When chat message received": {"main": [[{"node": "AI Agent", "type": "main", "index": 0}]]}}}