Unable to confirm reservation on my email

First of all, I’d like to say thank you for creating very nice plug in for WordPress.
I like every part of your plug in, WP Restaurant Manager.
I have just one problem though.
When customer send reservation request, I receive an email, and am able to confirm by clinking button “only” with customer who has an account with my website. Customer requested reservation without registration on my website, I receive an email notice, but unable to click to confirm thru my email. I am only able to confirm if I login to WP and confirm manually.
I am not sure if this is your intention, just a bug, or available only thru Pro version.
Please, guide me if there is any solution.
Thank you!