Groovy Script Issue

Summary

Problem entering a groovy script

Content

Hello all,

I have the below script that when pressing validate I got the below error. Can anyone help please?

if (isAttributeChanged('Assigned To') && AssigneePersonName == 'bala.gupta')
return StatusCd == 'In Progress-Agent'; 
else
  if (isAttributeChanged('Assigned To') && AssigneePersonName == 'Lisa Jones')
  return StatusCd == 'In Progress-Senior';
else
  if (isAttributeChanged('Assigned To') && AssigneePersonName == 'John Dunbar')
      return StatusCd == 'In Progress-Manager';

Error generated when pressing Validate:

Error(1,1) : An internal compiler error occurred: org.codehaus.groovy.syntax.RuntimeParserException: Cannot use return statement with an expression on a method that returns void . At [3:1] bc4j.null.gs.groovy See the logs for the error stack.