You don't 'ask'.
You give written notice with the advance notice required by your state. If it's 30 days, you write:
May 22, 2019
This is to inform you that I am terminating the rental agreement for (address), effective June 30, 2019. You are to vacate the property in good condition and have all of your possessions removed by no later than midnight on June 30, 2019. Failure to vacate will result in you being an illegal holdover and eviction will commence immediately. June rent is due on (the due date).'
If June rent isn't paid on the due date, you be ready with the 3-day Pay or Quit notice to give him, and if the 3 days passes with him either not paying or not moving out, you can start the eviction process then.
Research the landlord/tenant laws for your state. Call your local civil court clerk's office for guidance on what forms you need, where to file them, how to have them legally served (you can serve the 3-day yourself but you may need to hire a process server for the notice of eviction), and whatever other procedures are involved.
There will be fees. You can ask for the fees to be added to unpaid rent and damages you can prove.