"Non durante la cena"

Translation: Not during dinner

[siebolt]

No is used single: "si o no?" If it is used to negate a whole phrase: "Non ho voglia di farlo.", in combinations: "Non l'ho mai visto" (I have never seen him/it.)

[Novik]

Why in the original phrase it starts with non and not with no. non is only before verb, no?