There are two airports in Belo Horizonte, the International Airport at Confins and the downtown Pampulha airport. If you are flying to the Pampulha airport you will arrive very near the meeting venue, just take a cab to your hotel.
If you arrive at the International Aiport at Confins, Tancredo Neves, you can take a cab. A less expensive alternative is to take the "Conexão Aeroporto" shuttle bus. There is a line that will take you downtown to the terminal "Álvares Cabral". There is one other line that will take you to the Pampulha airport. Time tables can be found in the links below: