sorry , here you cannot book ticket.
you can visit www.irctc.co.in for booking
just follow this steps-
you have to first sign up or you have to create account on irctc
register your...
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details with IRCTC.Plan your journey and then you will get required train on route chosen by you and check the seats availability on any train you wish to travel.

Step 1- The www.irctc.co.in is simple to navigate. You will have to open an account at the website. Ensure that you put in the right names and details as you will be billed according to the account number. Registration is free. Once you have opened an account, a new window opens up with further details. If you have the train number you can proceed to step 2.
Step 2- Find the train you want by using the search engine located at the left hand side of the window. For example, I wanted information about the MATYSAGANDAHA EXPRESS and I was able to find a calendar of available dates that I can book. Two varieties of tickets are offered called ITickets, and ETickets....
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ITickets can be booked two days in advance but ETickets can be booked four to six hours in advance. Another advantage is that opening day booking (90 days in advance) is also available for customers.
Step 3- Once you have found the train you want, click on the BOOK button at the bottom of the page. Enter the names and date of birth of the passengers along with booth preferences. If you want another train, click the RESET button to go back.
Step 4- Once you have completed filling in the form you are prompted for payment. The site now offers credit card, direct debit and cash card payments for the tickets you have booked. Note down the PNR number and the transaction ID to confirm the booking and for verification. Tickets can be delivered to your home or you can print them.