Prepare a Python program to categorize sentences according to their sentiment. The program should first use the TextBlob library to detect the sentiment of each sentence and then classify them to Positive, Negative, and Neutral sentiment.
The service was excellent
from textblob import TextBlob

text = "The service was excellent"

sentiment = TextBlob(text).sentiment
print("Sentiment: {}".format(sentiment))

if sentiment.polarity > 0:
 print("Positive")
elif sentiment.polarity == 0:
 print("Neutral")
else:
 print("Negative")