Reverse charge mechanism on advocate

Dear Sir, We are Pvt Ltd received bill for Rs.15000/- from Advocate towards Professional charge for consultation, conference and giving opinion as per email dated 21.03.2015 to 31.03.2015. Kindly clarify that above bill exempt from payment of Service Tax under Reverse Charge Mechanism. Please Clarify at the earliest. Thank you, Regards Krishnamurthy