http://www.uspto.gov/web/offices/pac/mpep/documents/2200.htm

Please let me know if there is anything that you are unsure about, for example,

2269 Reconsideration

In order to be entitled to reconsideration, the patent owner must respond to the Office action. 37 CFR 1.111(b). The patent owner may respond to such Office action with or without amendment and the patent under reexamination will be reconsidered, and so on repeatedly unless the examiner has indicated that the action is final. See 37 CFR 1.112. Any amendment after the second Office action, which will normally be final as provided for in MPEP § 2271, must ordinarily be restricted to the rejection or to the objection or requirement made.

Be well