text: Eva: I'm going to have to cancel our Thursday's lesson this week.
  Eva: I have really bad laryngitis and I've totally lost my voice.
  Kaz: :-( Poor you!
  Kaz: We can reschedule for next week.
  Kaz: I have Tues and Wed slots I can fit you into.
  Kaz: Tues after 7pm or Wednesday after 7:30?
  Eva: I think Wednesday will be better.
  Kaz: OK.
  Kaz: Sorry I just realised I have an extra lesson this Wed. Can't do Wed.
  Eva: When can you do then?
  Kaz: Will have to check with the school and let you know.
  Kaz: I should know by Monday.
  Eva: OK
target: Eva has to cancel Thursday's lesson this week, because she lost her voice. Kaz will let Eva know when the lesson can take place next week.