Ban says Assad can participate in the international coalition being assembled to fight ISIS by seeking a political solution to the crisis in Syria:
He (Assad) can play a role through ending the crisis as soon as possible and engaging in political dialog.
He says that agreement is important on outside intervention in Syria, but stops short of saying that airstrikes against ISIS would need approval from Assad:
I know that some leading countries are trying to discuss the matter, and the position of the U.N. will be declared at the suitable time. But it is important that the international community is united and shows strong support for any action that has to be taken to root out this terrorism.