How to modify the attendess of an event in Calendar with Applescript?

I am trying to add/delete attendees from an event in Calendar.

In the following snippet I am trying to remove an attendee from an event if the email is user1@email.com

tell application "Calendar"
    tell calendar "Work"
        set evt to (first event where its uid = "XXXXXXX")

        set attendee_list to the email of every attendee of evt as list
        -- {"user1@email.com", "user2@gmail.com"}

        repeat with i from 1 to the number of items of attendee_list
            if item i of attendee_list = "user1@gmail.com" then
                tell evt
                    set email to "" -- ?????????
                end tell
            end if
        end repeat
    end tell
end tell

What's the correct syntax here? Any help would be appreciated!