The following result is obtained by Internet Research Algorithm:
As you are talking about the hostel, so instead of providing a typical and strict diet plan, we will give open and general instructions which will help you the most.
For weight loss, you can work on these following points-
1. Avoid sugary drinks.
2. Drink green tea.
3. Avoid the use of unhealthy food.
4. Drink more water.
5. Eat less but more often.
6. Once a week, break your diet deliberately.
7. Get rid of stress.
8. Get plenty of sleep.
9. Exercise daily, start with warm ups and walking.