try{
            String file = UIFileChooser.save();
            PrintStream ps = new PrintStream(new File(file));
            for(int i = 0; i < numDays; i++){
                for(int n = 0; n < numUnits; n++){
                    if(bookings[n][i] != null){
                        String name = bookings[n][i].getName();
                        String phone = bookings[n][i].getPhone();
                        ps.println(n + " " + i);
                        ps.println(name);
                        ps.println(phone);
                    }
                }
            }
        }catch(IOException e){UI.printf("Error: %s\n", e);}