Data formatting for fine tuned completion model

I want to create a fine tuned completion model
which contains multiple “properties” inside the prompt.

reading the docs about data preparation

I used this stop sequence for each property \n ,

like

{"prompt":"Draft: some text\nText: some text", "completion":" this and that"}

going throw the examples in the docs I found the chat bot example
which uses different stop signs

{"prompt":"Summary: <summary of the interaction so far>\n\nSpecific information:<for example order details in natural language>\n\n###\n\nCustomer: <message1>\nAgent: <response1>\nCustomer: <message2>\nAgent:", "completion":" <response2>\n"}
{"prompt":"Summary: <summary of the interaction so far>\n\nSpecific information:<for example order details in natural language>\n\n###\n\nCustomer: <message1>\nAgent: <response1>\nCustomer: <message2>\nAgent: <response2>\nCustomer: <message3>\nAgent:", "completion":" <response3>\n"}

what is the reason to use this signs ?

<
\n\n
\n\n###\n\n

is there any further information about this formatting ?