get field value form XMl in SQL

if you need to fetch field from XML in SQL you can use this query.Right now my XML look like this
i need to fetch the value of Expiry DateTime .


  DECLARE @Expiry_DateTime AS DATE
SELECT @Expiry_DateTime=XMLDATA.value('(/CustomerInfo//field//value//node())[3]', 'nvarchar(max)')
FROM KYC WHERE  UserName='test11FN'   and ID=4112532

XMLDATA is my column name where my XML store, 3 represent index which value you want to get , value represent this   <value>2017-05-31</value>. if i need to get the label value i just replace this query with  XMLDATA.value('(/CustomerInfo//field//label//node())[3]', 'nvarchar(max)')



<CustomerInfo>
  <field>
    <label>CustomerId</label>
    <type>hidden</type>
    <value>3323</value>
  </field>
  <field>
    <label>ID Number</label>
    <type>text</type>
    <value>23</value>
  </field>
  <field>
    <label>Expiry DateTime</label>
    <type>text</type>
    <value>2017-05-31</value>
  </field>
  <field>
    <label>Customer Name</label>
    <type>hidden</type>
    <value>test11FN</value>
  </field>
  <field>
    <label>Customer Email</label>
    <type>hidden</type>
    <value>testa11@mailinator.com</value>
  </field>
  <field>
    <label>Picture Image</label>
    <type>image</type>
    <value>https://www.abccom/public/photoid/3323/</value>
  </field>
</CustomerInfo>