Customer accepts order

Hi

When the customer receives confirmation of their order, I want them to read the email and click a button within it to click and ‘Accept’ they are happy to go ahead. What should I use for this?

I don’t want them to reply, just to hit a button that notifies the admin that they have accepted.

It would be great if they could tap the button and it automatically changes the order status but I expect this would need a lot of coding and have authentication issues.

Thanks for your help