Sample Package.xml

package.xml

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <types>
        <members>Lookup</members>
        <name>AuraDefinitionBundle</name>
    </types>
    <types>
        <members>LexComponentLookupDemo-1</members>
        <name>Flow</name>
    </types>
     <types>
     <members>LexComponentLookupDemo</members>
     <name>FlowDefinition</name>
  </types>
    <version>42.0</version>
</Package>