Hi, "I was professional and pleasant with everyone I spoke with, but I was most definitely fishing."
I think the word 'fishing' here is not the usual meaning.You're right. It's a figurative use. Physically, you fish to try to "get" a fish. Figuratively, for example, you can fish for a compliment, or fish for information.
basically, it means that you put ideas or words out as 'bait' for some intended response
The implication is that the 'fisher' is attempting to secure his/her goal even though he/she knows that the chances of success are slim. When I go out to clubs in Hollywood, I'm most definitely fishing for girls. LOL