[GTAguillaume]

OnPlayertext;

Code:

if(!strcmp(text,"Hello trader", true))
{
new Float:x,Float:y,Float:z;
GetPlayerPos(BOTID,x,y,z); //change BOTID
if(!IsPlayerInRageOfPoint(playerid,10,x,y,z)) return 1;
ShowPlayerDialog(playerid, ..... );
return 0;
}