Hello again, Carmen!
Welcome back to planDisney! Thanks for stopping by with another great question!
You can modify your
dining reservation from the Disneyland Resort
website by selecting “My Reservations” from the “Things to Do” drop-down menu. Then select the "Change Reservation" hyperlink for the reservation you wish to modify. From there you should be able to reduce your party size. You may also modify your party size in the “My Plans” section of the
Disneyland Mobile App. Select the reservation in question, choose the modify button and make the appropriate adjustment. You may also call Disney Dining at (714) 781-DINE (714-781-3463) and a Cast Member would be happy to assist you with modifying your reservation.
As a last result, you may wait until you check-in for your reservation. Depending on the number of Guests you’d like to add, the Cast Member at the host stand might be able to accommodate your entire party.
Please enjoy your time at “The Happiest Place on Earth!” Head back to planDisney with future questions!
Tiffanie