{% if issue.assigned_to is defined %}
Hello {{ issue.assigned_to }},

this ticket is assigned to you but wasn't updated for at least {{ days_since_last_update }}. We therefore assume that the problem has been solved in the meantime. If the issue persists, please reopen the ticket and give us a brief update on the situation.
{% else %}
Hello {{ issue.author }},

this ticket wasn't updated for at least {{ days_since_last_update }}. We therefore assume that the problem has been solved in the meantime. If the issue persists, please reopen the ticket and give us a brief update on the situation.
{% endif %}
Here is the ticket: {{ issue.url }}

Yours sincerely
Your IT Team