You might have to give up on a few words and re-arrange things. For example:
"It's a pleasure to be here," Electron replied with a smile.
You also can omit "X said" a lot of times. A new paragraph indicates a change in speaker, and when there are only two it can be clear. Once every three or four quotes you can clarify who is talking.
"I'll come visit you every now and again, if I'm not too busy," said Electron.
Colin smiled. "I'm sure the other patients will appreciate that as well. You been to the children's ward yet?"
"Not yet, I think I'll leave that for last. The kids won't want me to go, you know?"
"You're a good man, Electron," Colin replied, nodding. "I think we're gonna get along just fine. It's a pleasure to have you in my city."
"It's a pleasure to be here!"
Consider looking up synonyms for "said" and also sometimes replacing "said", like:
"I'm sure the other patients will appreciate that as well," Colin smiled.
In the last case, "smiled" takes the place of "said" and implies Colin was talking and smiling.
