Though I've only met them once, there's a person I facetime every night and I want to stop talking to them.
Are you of the opinion that all personal conversations should be limited?
No, I want to have a person I can have real conversations with.
If this is a person who you no long wish to converse with then it's perfectly acceptable for you to end the relationship you have with them. Just tell them respectfully that you want to end contact and move on.
That's good as I just don't have time for this.
Regardless of your reasons it's perfectly valid to not want to talk with someone anymore, especially if they're something you have only met in person once. Just be upfront and don't ghost them, as you don't want them to get upset or perhaps worry about you.