dialogue: Harry: we're on our way but Jane forgot your book
  Katie: No worries, next time
  Harry: where should we get off?
  Katie: change to piccadilly and get off at Finsbury Park, then take W7 to Muswell Hill
  Harry: thanks! how long does it take?
  Katie: with traffic up to 40 min ;/
summary: Harry and Jane are on their way but they forgot Katie's book. They will change to Piccadilly and get off at Finsbury Park, then take W7 to Muswell Hill. It will take up to 40 minutes. 