[rules-users] new-bie problem

Hello all, I am working on the excel driven rules application and have a small query. The app is for a mobile service provider. The following are the requirements. The company has 3 plans(apart from a default plan) which a user can opt from while taking the connection. However if the user does not choose any one, company grants a default plan to the user. Problem statement: I need to default to a plan using rules and not hardcode in my javacode. The rules should say that the user has not chosen any plan, hence grant him the default plan. I am not able to comeup with an excel sheet containing the rules. Rgds, rajeev