Who is the hunger games talk show host?

There is no talk show host in the Hunger Games. The Hunger Games is a fictional dystopian series by Suzanne Collins, featuring a televised event where children fight to the death for entertainment.

It's possible you're thinking of Caesar Flickerman, who is the flamboyant and charismatic host of the Hunger Games. He is the one who interviews the tributes and provides commentary during the Games.