The 31-year-old has been in outstanding form this season, scoring 11 goals in 26 Serie A matches for UEFA Europa League hopefuls Parma.
Cassano's club are unbeaten in 16 league matches, with his double in a 4-2 win at former club Milan continuing that run on Sunday.
"I heard what Prandelli said and I was very pleased," Cassano told Corriere dello Sport.
"I have to thank him. I understand that the challenge is beautiful and open.
"I am very happy because what will determine it is what happens in the field. And from that point of view I would say that I will give my all.
"It is a challenge that will allow me to start over in some ways, but also to conclude. I am a player who has had too much and on occasion thrown it away. I've always been one to do that.
"Now I have to think less about what was and more about the present.
"The present is what I want – the World Cup."
"Have I considered going? Sometimes I think about it… to get to the World Cup would be a success.
"Perhaps I could be decisive, to be appreciated there, it would be something I could keep with me for quite a while."
Cassano also dismissed reports linking him with a switch to Napoli, adding: "Napoli? I have two more years on my contract, I really want to finish my career at Parma."
