Dear Ms. Ordway,
When a Muggle with magical ability is born, their name is recorded in a book of future students at the appropriate School of Witchcraft and Wizardry, just as is true with those who have a magical parent or two. Those who live in Great Britain are recorded in the book at Hogwarts, and, provided they continue to reside here, receive a visit from a school representative the summer they are eleven, to explain things to their parents and present their welcome letter.
I am an alumnus of Hogwarts (1954), as a review of the faculty yearbook will tell you. The position of Head of Gryffindor House has been rather unstable, these past several years, but Professor Longbottom shows promise, and I expect that he will rise to the occasion and take that position.
If I had some small hand in helping Mr. Potter on his way to becoming an Auror, I am pleased, but he earned the qualifications entirely on his own. As I am sure you are aware, he is quite a powerful and capable wizard.
I expect you to work hard in your classes, Ms. Ordway. Flattery will get you no further than your studying takes you. That said, I appreciate your words and look forward to your achievements.
Hogwarts School of Witchcraft and Wizardry