Good luck at the end of the convo- can I still talk or is it the end?

I asked a guy for help with an internship, I reached out to him to ask how the application process goes and how the interview and everything goes. He replied back and helped, he answered some questions and he didn't answer others. I ended up texting him again but this time just to say Thank you for his help and his time and I was sorry for bothering him with my questions. He replied back saying- it wasn't a problem at all and good luck.

I want to ask him a few more questions but I feel like the good luck is a convo ender, I don't know I don't want to come off as annoying either.

What do you think?

Good luck at the end of the convo- can I still talk or is it the end?
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