I Reserved Ticket in 12287 Dehradun Express (Kollam to Udupi) for me and my family on 22/08/2014. But we changed our plan and 21/08/2014 we wants to Visit Guruvayur and to catch the Dehradun Express from Thrissur on 22/08/2014. So can I change the Ticket to (Thrissur - Udupi)..Can any one assist me...