what do I say during sex? 😅

I feel embarrassed even needing this advice but I want my partner to enjoy sex too. While we’re having sex if I moan he’ll say “what baby” or “how does that feel” and he’s expressed he’s want me to talk more during sex and whisper things to him too but I never know what to respond during. How should I respond in a way that will turn him on more? Also sometimes he’ll say “who’s my good girl” how do I respond to that? I feel so stupid needing to ask but i’m so shy in general and especially during sex but I want to do things to turn him on also.