Please elaborate. Why say "the conversation turned/continued" instead of saying what actually happened? Who brought up the meeting issue, him or you?
If it was you, I think he was looking for permission to stop going to meetings.
If it was him, he may have been fishing for a compliment from you, for you to tell him you are proud of him, etc., etc. Is this something he would do in other areas besides drinking? As an aside, most everyone I know in AA that is serious about sobriety hits several meetings a week, not just one, especially in early sobriety. Also, as an alcoholic, trust me, early sobriety is anything but easy.
Finally, look at his actions, not his words. If he is slacking in other areas, this is a bad sign. What demons have you seen start to raise their heads? Or are you just waiting for this to happen?