Between your first email to Julie to organize your meeting and the appointment itself, your list of participants may change. How can Julie handle this for you?
If you are the organizer of a meeting to which you want to add a participant: send an email to Julie asking her to send an invitation to your contact, which you copy on your email.
If you are not the organizer of this event, we will not be able to add a participant on your behalf, but the organizer can!