Mr Anshul, You can help yourself. Go to the top of this site, and on the left hand side you will find two columns showing Train from, and below Train To, and below that Get train. Just fill in Agra in the first and Dehradun. It will show a drop down menu, choose the cities, and click on Get Train. You will get a whole list of trains on the sectors you have entered. Choose from them and trying booking from PRS or from your IRCTC account. Or you can go to IRCTC.co.in and in the booking form enter the station from and station to, the date and other particulars, and done ! It will show you the list of Trains and you can choose from them! I hope this is clear. Good luck and good wishes.