What is the subject line for this email?

Vladi,  as per our discussion today, Sprague and Enron are canceling our deal to buy 6,000 Dth Transco Z6 NY for 12/4-31/01 (Sprague buying from Enron). Due to Enron's inability to deliver physical gas, Sprague will purchase supply from alternate suppliers. You and I netted out physical deliveries for 12/1-3. We will notify downstream LDC's not to accept any gas from Enron for us. If you have any questions, please do not hesitate to contact me. Thank you. 

Subject Line:
Cancellation of Transco Z6 NY deliveries, Dec 2001