How do I include the full conversation when replying to a ticket?

When responding to a customer in the inquiry module, you can attach the entire correspondence to the responses. Select firstSystem settings - Email letter templates- select a template for requests -Ticket Reply (Sent to Customer):

Specify the formula in the text template{ticket_reply_history}and save the changes:

Then when responding to the client's request:

He will receive a reply along with the history of the correspondence: