error: Database not selected

I'm stuck with this issue: No database selected. I roll over the same problems posted here, but after hours of reading I can't figure out why the database is not selected. I created a database job and a table job. I run the script with WAMP server. Sorry about the "everyday question." Please help!

<?php

// load Smarty library
require('C:/wamp/www/smarty-3.1.21/libs/Smarty.class.php');

$servername = "localhost";
$dbname = "job";

// Create connection
$conn = mysqli_connect($servername, $dbname);

// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}

$smarty = new Smarty;

$smarty->setTemplateDir('C:wampwwwapptemplates');
$smarty->setCompileDir('C:wampwwwapptemplates_c');
$smarty->setConfigDir('C:wampwwwappconfigs');
$smarty->setCacheDir('C:wampwwwappcache');


$rows = array();
$sql = "SELECT * FROM job";
$result = mysqli_query($conn, $sql);

if (!$result) {
    echo 'MySQL Error: ' . mysqli_error($conn);
    exit;
}

while ($row = mysqli_fetch_assoc($result)) {
    $rows[] = $row;
    }

$smarty->assign('output', $rows);
$smarty->display('result.tpl');

mysqli_close($conn);

?>