Formal:
* Comment va Logan? (This is the most direct and neutral way to ask.)
* Comment se porte Logan? (This is a slightly more formal way to ask, implying concern for Logan's well-being.)
Informal:
* Ça va Logan? (This is a casual and friendly way to ask.)
* Comment vas-tu, Logan? (This is a slightly more formal but still friendly way to ask.)
You can also use the following to get a more specific answer:
* Comment se sent Logan aujourd'hui? (How is Logan feeling today?)
* Qu'est-ce que Logan fait aujourd'hui? (What is Logan doing today?)
The best way to choose the right phrase depends on your relationship with Logan and the context of the conversation.