People are busy eating on the hotel.
the people are a conference for work
Just because people are eating on the hotel it does not mean they are at a conference for work.
exists e1 p1 x1 x2.(n_hotel(x2) & exists e2.(on(e2,x2) & Actor(e2,x1) & v_eat(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_busy(e1) & n_people(x1))
exists p1 x1.(n_people(x1) & exists x2 x3.((x1 = x2) & for(x2,x3) & n_work(x3) & n_conference(x2)))