text: Elisa: Ilo is turning 18 the 25th of march. Will you come?
  Gil: i'd love to, but I have an operation on the 20th.
  Elisa: nothing serious?
  Gil:  my knee, i'm old now🤣
  Elisa: too bad!
  Elisa: tell me, you could come earlier, on the 12th?
  Gil: yes why not?
  Elisa: parents and family are invited for Ilo's prom. 
  Gil: so early?
  Elisa: in Poland they have a sort of prom in march.
  Gil: i'll be proud to attend my goddaughter's prom.
  Elisa: done. Let's do a surprise.
  Gil: i'll keep my tongue.
  Gil: i took my ticket. Arrival march 11st at 12:45, departure march 13th at 17:35
  Elisa: good
target: Gil has a knee surgery on March 20th, so he can't come to his granddaughter Ilo's 18th birthday party on the 25th. Instead, he is going to come to her prom on the 12th. He is coming on March 11st at 12:45, and leaving on March 13th at 17:35.