Disable auto-invite to calendar appointments made with siri?

I'm just wondering if it's possible to disable the auto invitation feature in calendar?

When I create a calendar event with siri, for example "schedule a meeting with John Doe", it automatically sends out an invitation email to John Doe. Is there a way to turn this off? I create those calendar events for my own personal use, I don't want others to have to respond to this.

Thanks