{"product_id":"n8n-workflow-reduce-no-shows-with-sent-google-calendar","title":"n8n Workflow: Reduce No-Shows with Sent \u0026 Google Calendar","description":"\u003ch3\u003eReduce No‑Shows Automatically: Google Calendar Reminders via Sent\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow checks upcoming Google Calendar appointments every 15 minutes, validates customer phone numbers, and sends timely reminder messages through \u003cstrong\u003eSent\u003c\/strong\u003e. It also handles inbound \u003cstrong\u003eSent\u003c\/strong\u003e replies to confirm or reschedule appointments by updating the Google Calendar event details—helping you cut no‑shows without manual follow-up.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRuns every 15 minutes\u003c\/strong\u003e and also triggers immediately when \u003cstrong\u003eSent\u003c\/strong\u003e receives an inbound customer message.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoads and validates settings\u003c\/strong\u003e such as your \u003cstrong\u003eGoogle Calendar ID\u003c\/strong\u003e, \u003cstrong\u003ebusiness timezone\u003c\/strong\u003e, \u003cstrong\u003eSent template name\u003c\/strong\u003e, and a \u003cstrong\u003ereschedule URL\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eOn scheduled runs, it \u003cstrong\u003efetches upcoming Google Calendar events\u003c\/strong\u003e and determines whether a reminder is due (around \u003cstrong\u003e24 hours\u003c\/strong\u003e for the first reminder, and around \u003cstrong\u003e2 hours\u003c\/strong\u003e for the final reminder).\u003c\/li\u003e\n  \u003cli\u003eIt intelligently \u003cstrong\u003eskips events\u003c\/strong\u003e that are \u003cstrong\u003ecancelled\u003c\/strong\u003e, \u003cstrong\u003eall-day\u003c\/strong\u003e, have an \u003cstrong\u003einvalid phone number\u003c\/strong\u003e, are already \u003cstrong\u003econfirmed\u003c\/strong\u003e, or have a \u003cstrong\u003ereschedule requested\u003c\/strong\u003e status.\u003c\/li\u003e\n  \u003cli\u003eFor eligible appointments, it \u003cstrong\u003evalidates the customer phone number\u003c\/strong\u003e using \u003cstrong\u003eSent number lookup\u003c\/strong\u003e (E.164), then sends the reminder using a \u003cstrong\u003eSent\u003c\/strong\u003e message template with an \u003cstrong\u003eidempotency key\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eWhen a reply comes in, it \u003cstrong\u003eparses the message\u003c\/strong\u003e for confirmation, reschedule requests, or \u003cstrong\u003eopt-out keywords\u003c\/strong\u003e—and stops immediately for opt-outs.\u003c\/li\u003e\n  \u003cli\u003eIt then \u003cstrong\u003ematches the sender phone number\u003c\/strong\u003e (and reference code when needed), \u003cstrong\u003eupdates the event description\u003c\/strong\u003e with SENT status, and responds with either a confirmation message or a \u003cstrong\u003erescheduling link\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eIf no matching appointment is found (or multiple matches exist without a reference code), it sends a \u003cstrong\u003eclarification message\u003c\/strong\u003e or ignores unrelated inbound messages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eClinic, salon, or appointment-based services reducing \u003cstrong\u003emissed appointments\u003c\/strong\u003e with two-stage SMS reminders.\u003c\/li\u003e\n  \u003cli\u003eTeams that want to \u003cstrong\u003econfirm attendance\u003c\/strong\u003e or \u003cstrong\u003eenable rescheduling\u003c\/strong\u003e directly from inbound customer replies.\u003c\/li\u003e\n  \u003cli\u003eSaaS operators using n8n to manage operational messaging around \u003cstrong\u003eGoogle Calendar\u003c\/strong\u003e events.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e n8n automation workflow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTech stack \/ nodes:\u003c\/strong\u003e if, set, code, no op, sticky note, \u003cstrong\u003esentdmn8n-nodes-sentsent\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrations:\u003c\/strong\u003e \u003cstrong\u003eGoogle Calendar\u003c\/strong\u003e + \u003cstrong\u003eSent\u003c\/strong\u003e (reminders, inbound replies, number lookup)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBehavior:\u003c\/strong\u003e scheduled polling every 15 minutes + inbound trigger handling; event description updates; opt-out detection\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45877625585843,"sku":"N8N-18556","price":21.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/TzAy75bywPDthhJPeHdOS_eDmcwUOO.png?v=1787337296","url":"https:\/\/buyflowscripts.com\/products\/n8n-workflow-reduce-no-shows-with-sent-google-calendar","provider":"N8N Commerce","version":"1.0","type":"link"}