TMEP § 1805
USPTO employees will gladly answer questions about the procedures for obtaining and maintaining a registration. For general information, callers may telephone the Trademark Assistance Center at (571) 272-9250 or (800) 786-9199. See TMEP §108.02.
However, USPTO employees cannot:
For a legal opinion about a trademark matter, a party must consult a private trademark attorney. The USPTO cannot aid in the selection of an attorney. 37 C.F.R. §2.11. Private trademark attorneys are generally listed in the yellow pages under the heading "Lawyers, Patent and Trademark," or "Lawyers, Trademark."
See TMEP §104 regarding trademark searches.
See TMEP §1806 regarding contacts with third parties about ex parte matters.