How to retrive error message from response in report using r

I am using soapUI Pro for webservice testing, my problem is I am not able to retrived error message from the server for failed test case in the html report.

I tried to use regular expression in the assertion but I received error message as assertion pass or fail but not the error message which I was received in response.

I want fault string error message in assertion pass fail message.

Can any one help me out?