text: Emma: Guys, are you in Sucre now?
  Kate: No, I'm still in Europe :P
  Jose: Yes, why?
  Emma: I thought about visiting
  Marie: nice, come here
  Jose: anything happened?
  Emma: i think I'm experiencing some little troubles because of the altitude here
  Jose: nausea? Headaches?
  Emma: yes
  Jose: it may be altitude sickness, Sucre is much lower but still quite high above see level
  Jose: around 2800m and altitude sickness starts at 2500
  Emma: yes, but La Paz is 3600m, I think it'll make a difference
  Jose: sure! So come here as soon as possible :)
  Emma: I'll check the connections and let you know, thanks!
target: Emma wants to visit Jose and Marie who are in Sucre because she thinks she's got altitude sickness in La Paz. Kate is still in Europe.