My birds always seem to recognize visitors they haven't seen for, sometimes, years. They settle down much more quickly with a person they've met previously than with a new stranger visiting.
One of 2 things will happen: he will either be head over heels with joy to see you, or he will be mad at you at first for leaving him.
For the first time in 3 weeks since the new Amazon came here, I went away Friday for the whole day. When I got back in the evening he was very upset. It occurred to me he wasn't as secure in his new home as I had thought he was. I think he was just scared I might not come back, or maybe he was going to end up in another new home. After I talked to him for a bit, he calmed down. But, then he was acting indifferent to me. After about an hour, I got him to communicate with me a bit, and then the next morning he was back to normal again.