I’m using the following which seems to be working well:
# Define the system message and message history
pSystemMessage = "You are an AI assistant that answers questions factually based on the information:"+source_identifier+" provided to you. When answering you will give detailed answers along with relevant related information contained in the information:"+source_identifier
# Create a new user message for each grouped answer group
user_message = source_identifier+":\n" + source_text
# Initialize the message history for the grouped answer group
pMessageHistory = [
{"role": "user", "content": "The following "+embeddingType+":"+source_identifier+ " is to be used when answering subsequent questions. If the answer to the question is not contained in "+embeddingType+":"+source_identifier+ ", answer with Sorry."},
{"role": "assistant", "content": "I will use the "+embeddingType+":"+source_identifier+ " you supply to answer subsequent questions factually and in detail along with related information."},
{"role": "user", "content": user_message},
{"role": "assistant", "content": "Please ask your question and I will answer based on the "+embeddingType+":"+source_identifier+ " you have supplied.If the answer to the question is not contained in the "+embeddingType+":"+source_identifier+ ", I will reply with Sorry."},
]