This is a very nice story, and I personally like it! I just have a few pointers.

There are some great stories out there that only use said, but you should use different words! Make it interesting. Mumbled, muttered, whispered! You could used "said nonchalantly" or "said absentmindedly." It just helps to give the impression of how the character is talking.

When someone new starts talking, start a different line. It's hard to follow when you have multiple characters all taking in one paragraph.

Again, love this story! I think it has a lot of potential! Hope I helped somewhat!