{% if owner %}

Your Booking Has Expired.

Your booking has ended and the machines have been cleaned up.

Thank you for working on {{booking.lab.project}}, and feel free to book more machines if you need them.

{% else %}

A Booking That You Collaborated on Has Expired.

The booking owned by {{booking.owner.username}} that you worked on has ended.

Thank you for contributing to {{booking.lab.project}}.

{% endif %}
{% for user in booking.collaborators.all %} {% empty %} {% endfor %}

Booking Information:
Owner:	{{booking.owner.username}}
id:	{{booking.id}}
lab:	{{booking.resource.template.lab.lab_user.username}}
resource:	{{booking.resource.template.name}}
start:	{{booking.start}}
end:	{{booking.end}}
purpose:	{{booking.purpose}}
collaborator{% booking.collaborators.all.count|pluralize:"s" %}:
	{{user.username}}
	No collaborators

You can find more detailed information here