What's better for the type of chatbot I am building? Fine tune or embedding?

Is this with embeddings? I have a similar question here: I read about embeddings and I want to try it. How to start?. I have a document I want the bot use for questions. I tried it with fine-tuneing but the answers were very poor quality. Should I use embeddings? What is the shot? Do you mean to put the example in markers into the prompt followed by the real questions?

I tried something similar with fine tuning: I read about embeddings and I want to try it. How to start? - #3 by Tetramatrix

{“prompt”: “Subject:XXX\n\n###\n\nSummary:XXX.\n\n###\n\nCategory:XXX\n\n###\n\nCustomer:XXX.”, “completion”: “XXX”}

I put this \n\n###\n\n as marker. Is it right? A more simple training data would be:
{“prompt”: XXX, “completion”: XXX} but I wanted to add as much data as possible and there is an similar example on openai website: OpenAI Platform

But it didn’t seems to help.