general => General
booking => Booking
entertainment => Entertainment

<?php
$contact = $this->data['contact___reason_for_contact'];
    switch ($contact) {
    case 'general':
        $email = 'email1@mail.com, emailw@mail.com';
        break;
    case 'booking':
        $email = 'email3@mail.com, email4@mail.com';
        break;
    case 'catering':
        $email = 'email5@mail.com, email6@mail.com';
        break;
}
return $email;
?>