Dear Vinnetha and Ria,
There are a lot of accent training institutes in Delhi, Bangalore and Chennai.
You could also learn accent online from:
http://esl.about.com/gi/dynamic/offsite.htm?site=http://www.americanaccent.com
Hope this helps…If you need more information concerning train the trainer in accent revert back.
Thank you for your time..
regards
Krsna Yadav
Bangalore