In order to get such reservation you will have to fill the form like this :-
Suppose you want to go to Amritsar from Mumbai Central Than
Train No 12137 Date DD/MM/YY
From :- Mumbai Central To :- New Delhi & Reservation up to Amritsar
Class...
more... ....... No of Pax
Onward Journey
Train No :- 12497
From :- New Delhi To :- Amritsar
Class :-