[@Shiny Keldeo] Even if that could be the case, word would spread quickly to members still around the Guild/town. Those who don't have priority missions, (Ones that involve life or death scenarios) were asked to stay in town. Lower priority missions would be things like fetch quests to get civilians goods in a dungeon or escorts to locations or Pokémon that aren't really important. Those who also may have went out on shorter low priority missions earlier may have also been returning to the Guild when he made the announcement.