The screenshot below shows the full details page for a Jira Service Desk help request. You get here by clicking directly on the request number (e.g. "LTS-1081"). The numbered items show handy features of the JIRA system.
Under the request's title is the Comments section. You can add comments to the request--these comments get emailed to the LTS staff working on the request.
Details of the original request form answers are shown under the Comments section. You cannot edit these details, but LTS can so if something should be changed just add a comment.
The "Shared with" section on the right shows all the people involved with your request – both LTS staff and any co-workers in your department also involved with the issue.
the "Share" button allows you to add people to the request. They will receive all future updates about this request.