dialogue: Sara: Hey, are you free this Saturday?
  Sara: I thought mayble you would like to help with the event we're organizing?
  Victor: Unfortunately I'm busy this Saturday...
  Sara: Shame...
  Victor: Yeah, I know. Maybe if you let me know earlier, I might have changed my plans, but now it's too late.
  Sara: Ok. Another time then :(
summary: Victor cannot help Sara with the event they're organizing as he's busy this Saturday.