How does Cassio greet Emilia and Desdemona, and how do they respond

Cassio greets them all, especially praising Desdemona; somehow, Iago and Desdemona enter into an argument about what women are, and Iago shows how little praise he believes women deserve. Though Iago banters with Desdemona, he affords his wife no respect at all. She responds defensively.

Cassio is a ladies man which angers Iago when Cassio greets Desdemona and Emelia with a kiss.

"A smooth dispose to be suspected; fraud to make women false." - Iago blames Cassio for making women false and is going to use Cassio's interest in Desdemona as proof of an affair between Cassio and Desdemona, to make Othello jealous.