you go to Carmilla Carmine for information on how to kill angels as you try to talk she says

Carmilla Carmine: "90 seconds to talk go."

she sounds quite aggressive as she says this but you should talk before it hits 0 and your out of time and that wouldn't really be good since she might attack you.

Carmilla Carmine: "come on speak! 60 seconds left" she sounds quite annoyed you should speak now