dialogue: Udo: I'll be in 20 minutes
  James: whaaat? you were supposed to be at 6
  Udo: ...
  James: lol u messed up hours again :D
  Udo: OK so I'll go shopping first
  James: Visit me at 5.30 then :D
summary: Udo was supposed to visit James at 6. He came earlier as he mixed up the hours. James offers that Udo can come at 5:30 instead.