You also need to pay air-ticket in any situtation. Beside, if you ask her to early leave, you need to pay the one month salary for notice because is you ask her leave and this is not her decision.
Bingo!! 但因為咁,佢亦都有權同你講話做到12/01而唔比番代通知金你,of coz你都唔可以say no,如果唔係,你要比番佢ga la.Anyway, becareful and remember to ask her to give you a resign. letter. Why you don't ask your agency to help you??