How to compare JMS response in soapui using groovy script

I want to compare response element with expected output and save this result into result file.

expected output:

CustomerId=CUSTOMER_ID10

response:

CustomerId=CUSTOMER_ID11

then result file should have CustomerId=fail

It's JMS response:

<?xml version="1.0" encoding="utf-8"?>
<Service>
<CustomerId>CUSTOMER_ID10</CustomerId>
<Community>SEPAMAIL</Community>
<Service>RUBIS</Service>
<Register>false</Register>
<Actor>Actor</Actor>
</Service>