HEY RAVJOT.

The hostel allocation in Panjab University is done based on your rank in the merit list of admission to your respective course. This is because of limited seats in the hostels. There is not much problem for hostel allocation in the boys hostel. But the seats in girls hostels are limites hence only people with better ranks will be alloted. Considering  your rank is 103 in the merit list, you seem to have good chances that you'll be alloted the hostel in the first list itself.

Best of luck