Add office name to enquiry emails

gistfile1.txt

add_filter( 'propertyhive_property_enquiry_property_output', 'customise_property_output_in_enquiry', 10, 2 );
function customise_property_output_in_enquiry( $output, $property_id )
{
    $property = new PH_Property((int)$property_id);
    $office_name = $property->office_name;
    return 'Office: ' . $office_name . '\n' . $output;
}