My fiance's parents are hosting our rehearsal dinner, but due to certain logistics they prefer that guests RSVP to us and not to them- FMIL is hearing impaired so she doesn't want guests to call, and they travel very frequently so a mail-in RSVP for a rehearsal dinner would be difficult to manage. How can we phrase the rehearsal dinner to acknowledge that they are hosting, but that RSVPs should be called or emailed to me?