[Zeth]

PHP код:

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    new Float:x,Float:y,Float:z;
    if(dialogid==2 && response==1)
    {
        switch(listitem)
        {
            case 0:
            {
             GetPlayerPos(playerid,x,y,z);
             CreateVehicle(522,x+3.0,y,z,0,0,0,0);
            }
            case 1:
            {
             GetPlayerPos(playerid,x,y,z);
             CreateVehicle(522,x+3.0,y,z,0,0,0,0);
            }
            case 2:
            {
             GetPlayerPos(playerid,x,y,z);
             CreateVehicle(522,x+3.0,y,z,0,0,0,0);
            }
        }
    }
    //add next one here
    if(dialogid == put dialog id here)
    {
        //statements and functions here
    }
    return 1;
} 


and for your convenience here are some tips:
*Use easyDialogs for making dialogs as you are getting confused with OnDialogResponse
*Try to intend your codes, it will be easier for you to read them later.