"I can't remember," I said sadly and the girl smiled and spoke.Firstly, in dialogue you should not follow a character's speech with words like 'sadly', it should be visible in the spoken words. Another thing, the part after 'I said' really shouldn't be there. So as a correction, this should be,
"I can't remember," I said.
The girl smiled and spoke.(I would really go with 'said', instead of spoke. You could follow the girl's words after this.)
SoulReaper wrote:The feline looked at Harkley in complete amazement