Lookup user info in a Workflow

Business Requirement: Use the Name user property in an Email sent out by a Workflow Suppose following scenario: you have created a site based on the Help Desk template, one of the Application Templates for Windows SharePoint Services 3.0. With Microsoft Office SharePoint Designer 2007, you have added a Workflow to the Service Requests list which sends out an email each time a service request is changed to the Service Representative. Problem is that the user information in the email will be the Account, though you would prefer to have the Name in the email.