MileStone-3:-Preliminary-Requirements.md

@@ -20,6 +20,8 @@ b.Test without clicking the coffee-add button (fail to add coffee)
 
 **Story Points:** 2 stories
 
+**User Stories and Accepting test:**
+
 As Jack, I want to be able to grab the coffee correctly by using the order number or  my phone number, which can make sure that I get the order I need.
 Tests: