Will be flying LX181 BKK-ZRH in F. I am not connecting to MAN until 12:10 (didn't book the 7am flight due to it being on separate ticket) and would really appreciate the sleep after the 12hr flight. Since a lot of long-hauls are arriving into ZRH around this time I imagine the lounge may be quite full with connecting passengers. I have never used the sleeping rooms before so want to know how many there are and how likely they are to be full. Should I send a message to LX in advance to reserve one?

Thanks