12704 Secunderabad Junction-Howrah Junction Express Train

It is a demanding train - moving between Secunderabad to Howrah. You will not get ticket, if not booking before more than two month. On the other hand another train from Hyderabad to Howrah (East Coast) train tickets will also be not available before one month. The difference between the two trains is only the travelling time and number of stoppage.
When there is so much demand, why not the railway introduce more trains between the stations with convenient time and good speed.