Use case

1. System display the list of location
2. Prompt user to choose the location
3. System display the list of restaurants on the location user choose
4. System prompt user to choose the restaurant
5. System show the ingredient supplier’s list for the restaurant
6. System prompt user to key in the number of person
7. System display the menu list and price
8. User choose the menu to find out the dish details
9. User add selected dish to order list
10. Let user key in remark
11. System prompt user to check the order list
12. Restaurant directly receive order
13. Restaurant respond to the order
14. Order confirm