Ask Siri to set up a meeting.

You can ask Siri to set up a meeting by saying, “Set up a meeting with John in my office at 2:30.” Siri will check your calendar and ask you to confirm. The other attendees will receive an email that they can reply to. You can also ask Siri about your meeting. For example, “Where is my four o’clock?”

by via Apple - Support - Most Recent - iPhone