Susan: When are you coming?
Paul: I'll be there in 1 hour
Pieter: 1,5-2 hours
Susan: OK
Susan: I'm already here
Susan: I'm on the 5th floor
Susan: South wing 
Susan is on the 5th floor in the south wing. Paul will be there in 1 hour. Pieter will arrive in 1,5 - 2 hours.