Using the tweet "What is the point of @DPD_UK giving 1hrdelievry slots when they are over 30mins late so far and no notice or update. #unhappy", determine how much sadness is shown. The categories are: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.