Need to extract the value of an attribute from response XML

Try the below code and consider this xml:-

<AssessmentOrder>
<Assessment packageTag="A_VAT_Induct" name="Verify - Inductive Reasoning (2007)" orderItemRef="2183404" language="MULTI" stage="1" jobLevel="Graduate/University" originalTimer="00:25:00" adjustedTimer="00:25:00"/>
<Report packageTag="A_VAT_Induct" name="Verify - Inductive Reasoning (2007)" orderItemRef="1711998" language="en-US" comparisonGroup="" reportFormat="Pdf" reportMedia="Link"/>
<AssessmentAccess hasAssessments="true">
<Assessment stage="1">
</Assessment>
</AssessmentAccess>
</AssessmentOrder>

def groovyUtils = new com.eviware.soapui.support.GroovyUtils( context )
def holder = groovyUtils.getXmlHolder( "Request_Name#Response" )

for( orderItemAssess in holder.getNodeValues( "//*:AssessmentOrder//*:Assessment/@orderItemRef" ))
log.info orderItemAssess
for( orderItemReport in holder.getNodeValues( "//*:AssessmentOrder//*:Report/@orderItemRef" ))
log.info orderItemReport

 Now try this code.