fix wrong printing message

parsePreferredInterval is still wrong message (but idk if can fix)

src/main/java/housekeeping/hub/logic/parser/ParserUtil.java

@@ -201,7 +201,7 @@ public static Booking parseBooking(String booking) throws ParseException {
             Booking parsedBooking = new Booking(booking);
             return parsedBooking;
         } else {
-            throw new ParseException(HousekeepingDetails.MESSAGE_CONSTRAINTS);
+            throw new ParseException(Booking.MESSAGE_CONSTRAINTS);
         }
     }