This automation sends a Slack notification when a calendar event isn't accepted and creates a HubSpot task reminding you to call or email the lead.

 

 This automation has 2 components. 
1. Sending a Slack notification when a Calendar event is NOT "accepted"
2. Creating a Hubspot task that informs you to call/email the lead

If you don't use Google Calendar, switch the first module out with your Calendar app.