Dina, I will be going to the department store later.
{Dina, je vais aller au magasin plus tard.}

Do you want me to buy anything for you?
{Tu veux que je t'achète quelque chose?}

No.
{Non.}

No, thanks.
{Non, merci.}

But dear, you haven't been eating anything recently and you seem thinner than before...
{Mais chérie, tu n'as rien mangé récemment et tu sembles plus mince qu'avant...}

I'll buy you something to eat later.
{Je t'achèterai quelque chose à manger plus tard.}