Step 4.1: Claim you're already committed to an "Meeting" on the same day, at the exact same time, with the same people, but it was just a Social Engagement and didn't actually happen. (Note: this one requires a solid understanding of meeting etiquette.)
Step 4.2: Claim you were forced into a Meeting by your Social Engagement host and you're still recovering from the trauma. (Note: this one requires a strong understanding of social manipulation.)