!3 ''Pay using a voucher with expire date.''
|''begin transaction for client''| Joanna |''staff''| Bill|
|''rent''|2||coffee dispenser|''for''|3 days|
|'''reject'''|''pay with voucher $''|50.00|''that expires after''|2004/05/05 17:00|
|''pay with voucher $''|50.00|''that expires after''|2004/05/06 17:00|
|''complete transaction''|