[Elysian`]

pawn Код:

DIALOG_DIALOG:
{
    if(response)
    {
        switch(listitem)
        {
            case 0:
            {
                // code
            }
        }
    }
}

P.S: Try using that one above that I've given you, it'll work out easier and you'll be able to keep track of what's what.

EDIT: Or what RealCop has done.