Instruct: Classify a given review into positive or negative sentiment.
Query: unsatisfied with the unsuccessful delivery

I was very upset that I never received the book. I had purchased the book for a friend and I had to apologize to my friend for not being able to give her the book she needed for a class. Then to add insult to injury, when I tried to contact the seller, I did not receive an e-mail. I will definitely re-consider purchasing something from this seller.