I am sending one invitation out for 3 events. The planners for two events would like for people to make a reservation for each of those events with their reply. So next to those events, there is wording that a reservation is requested ("reservation is requested with your reply"). Please note the singular "reservation".
For the third event, the planner does not need or want folks to make reservations. So should the wording be "no reservation needed" or "no reservations needed"? Or can it be either way?