Position of alert message in confirmation page

I have a page that displays a transaction summary where the user can perform a final check before clicking the confirmation button.

I am not sure on where to place this alert message: "Please ensure the details are correct before hitting the confirm button"

Based on my survey, this alert message is placed under the summary and above the confirmation button. But does it make more sense to have it before the summary so the user is reminded to check the details carefully when they read it the first time?

I am also not sure on the italics in the alert message above.

Kindly advise and thank you in advance :)