We want our eMails to trigger Siri to suggest an addition to the user's calendar: If someone buys a ticket through our website, Siri should suggest adding the event to the user's calendar.
Apple discusses Siri doing this: https://support.apple.com/guide/calendar/use-siri-suggestions-iclc121e66ee/mac ...but I haven't seen any documentation of how to lay out an eMail so that Siri will realize it describes an event and successfully extract the into from it. Our current eMails don't trigger Siri Suggestions.