13 still have availability for your group to come to the Conference room. If you do not already have a one-night stay. but still full of the same date, 14.
13 provides a space for you. The Group will reduce the number of conference rooms. If you do not have accommodation One can also stay for another night but 14 still remain intact.
The 13 there's an empty room for you. Because the group to reduce the seminar room. If you have no shelter. Can also stay for one night, but the 14 also fully intact.