You will be given a definition of a task first, then some input of the task.
In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

Was suppose to receive this phone case on Saturday and still has not been delivered. Really disappointed in the fact that I have the option to track package but has never been updated. Will never buy from them again.
Output:
Really disappointed in the fact that I have the option to ...