Thank you for your response.
I tried calling them up but they don't seem to answer their phones. However, I did find this in the Chicago consulate's website.
NOTE: CITIZENS OF UNITED STATES, AUSTRALIA, BULGARIA, BELGIUM, BRAZIL, CHEC REPUBLIC, DENMARK, ESTONIA, FINLAND, FRANCE, GREAT BRITAIN AND NORTHERN IRELAND, GUYANA, HONG KONG (RAEHK), HUNGARY, ICELAND, JAPAN, MALASYA, LETONIA, LITHUANIA, NEW ZEALAND, THE NETHERLANDS, NORWAY, POLAND, REPUBLIC OF COREA, ST. LUCIA, ST. VINCENT AND THE GRANADINES, SINGAPUR, SWEDEN, SOUTH AFRICA, FRANCE, SLOVENIA, THAILAND, AND TRINIDAD AND TOBAGO DO NOT REQUIRE BUSINESS VISAS.
THEY WILL BE ALLOWED TO STAY 90 DAYS.
It confirms that I don't need a visa.