Former AC Milan coach Leonardo would discuss any offer to become Brazil's new boss but insists no talks have taken place so far.
Speculation is rife that Leonardo will succeed Dunga, whose contract was not renewed following Brazil's disappointing World Cup campaign.
And although the 40-year-old admits it might not be the right time to take charge of Brazil, he knows it would be a difficult job to turn down and told Sky Italia: "I don't know if you can say no or yes. I'm not looking for a job, I'm looking for a dream. I have decided to make myself available to everyone."
He added: "If I had to choose my path, maybe this would not be the right time. It's been 20 years that I've been outside Brazil.
"I have decided to make myself available. If nothing happens, I will decide after that what I will do.
"I'm giving my availability because it is the first time I have spoken. I haven't spoken in Brazil because it didn't seem to me to be the right moment."