Below is the translation of one of the Duas that the Remnant of our Akabir, the Sublime Spiritual Leader, Sultaanul Aarifeen, the Grand Mufti, Allamah Mufti Ahmed Khanpuri (May Allah preserve him) regularly makes on the occasion of a Quran Completion Ceremony. The Dua is usually commenced with Arabic Masnoon Duas and ended with Arabic ones. Below are his personal words.

O Allah, fully accept these children who completed memorising the Pure Quran. In the manner that You have beautified their hearts with the Words of the Quran, also grant them the Quranic Uloom (knowledge) and M’aarif (insight). Give them the ability to be punctual in practising Quranic good deeds.  Garb them with the elevated Quranic character. Grant them the ability and fortune to fulfill the right of memorisation by allowing them to recite the Quran day and night as much as possible. The promises and glad tidings which You mentioned on the blessed tongue of Your Beloved Messenger (صلى الله عليه وسلم) concerning the completion of memorizing the Quran, completely grant them to these children,  their parents,  teachers,  family members and their trainers. Make it easy for all those to complete the memorisation of the Quran who are in the Hifz classes.

Aameen Ya Rabbal A’lameen.

[Dua Aise Mange (Supplicate in this Manner) Pg.39]
The pdf of the original Urdu book is available here.