text: Kai: there's a really cool concert tonight if you're not busy
  Kai: <file_other>
  Alex: oh i know this band
  Alex: played a show together with them once hehe
  Kai: my friend plays the bass guitar there
  Alex: it's really close to my place
  Alex: maybe i'll come, but not sure yet
  Kai: no worries, just saying
  Alex: i'll let you know
target: Alex may go to the concert of the band where Kai's friend is playing