What do I say about why I left my last job? after 7 years as a hotel front-desk agent

I have an interview next week and I am unsure how to explain why I left my last job as a hotel front-desk agent. This is my first time dealing with any of this. I do not want to blame the company. What do you say?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.