We have a client in need of a ticketing solution for their domain (let's call it www.domain.com) which is on Wordpress - as is our custom ticket solution.  However, we want to have full control of the ticketing, since we manage it for them - so we do not want to build it inside their original Wordpress install. Our proposed solution is to build it on tickets.domain.com.  This will exist only for selling and issuing the tickets. The question is, is there a way to do this without damaging their bounce rate and SEO scores?
Since customers will come to www.domain.com, then click the ticketing tab and land on tickets.domain.com, Google will see this as a bounce.  In reality, customers will not notice the difference as we will clone the look and feel of domain.com Should we perhaps have the canonical URL of tickets.domain.com point to www.domain.com? And also, can we install Webmaster Tools for tickets.domain.com and set the preferred domain as www.domain.com? Are these possible solutions to the problem, or not - and if not, does anyone else have a viable solution? Thank you so much for the help.

We are using Yoast for a number of our sites.  We use naked domain as the canonical. I have noticed in the header tags that all our sites show the canonical URLs as having a trailing slash: Example:   http;//foxspizzajc.com, when I look at the source code, it shows the canonical as http;//foxspizzajc.com/ Of course, it is much more likely that all sites that link to us will not use the trailing slash - so preferably we do not want that to be the canonical - among other reasons. Does this need to be fixed so the trailing slash is removed? I cannot see how to do this in Yoast SEO or in Permalinks structure for Wordpress. Sorry for my ignorance. Thanks for any help.