Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Service if threatened

I ordered this book from Amazon.com on March 31 and received an email on April 3 that the book had been shipped. However, there was no sign of the book until May 2. I wrote back to the bookstore and told them that I would have no choice but to give them the lowest rating if they did not ship the book and lo behold - the store shipped the book on May 3.