u r tkt wil be mentioned as CNF only coach / Berth no / Cabin No will b alloted after preparation of Chart... if only 2 pax, chances of getting coupe is more, but not guaranteed. bcos FC / I AC are prone for VIP movements.... and also sometimes, even if u booked I AC, after chart preparation u r tkt may downgraded to 3rd or 2nd A/c..(but very rare )