I wanna meet Luigi!
From the Super Mario Wiki, the Mario encyclopedia
Mario must travel to Poshley Heights and talk to Toadia while wearing the L Emblem badge, and she will assume Mario to be "Luigi". The real Luigi will then walk in and attempt to assess the situation, but Toadia will snub his advances. After Luigi walks away, thinking that it is "all a bad dream", Toadia rewards Mario with a Choco Cake, and the trouble is solved.