As talked to BCD, they cannot book the V class (from Zurich to Madrid) as Cario did. First reason is V class needs to confirm within 24 hours, and unable to change. So it's not a good option if we book Business class from BKK -> Zurich and connected with this class.
Btw, BCD is checking the direct flight (business class) from BKK to Zurich instead krub. Fare should be cheaper.