List the menu in duplicate, one for the guests after ordering and one for the kitchen. When guests change their minds and change their orders, they should cross out the items on the memo menu to prevent confusion.

For the guests who arrive at the store, the specialties are delicious and the guests are satisfied. It's not your fault that the specialties are not delicious. Knowing in advance where guests come from and what dishes they like to eat is just asking acquaintances.