Here are the Merge Tags you can use for Variant-specific text.
Add the following Merge Tags at the beginning of the template:
{% set ns = namespace(early=false) %}
{% for ticket in TRANSACTION.TICKETS %}
{% if ticket.VARIANT_NAME == 'Off-Peak Ticket' %}
{{ ticket.VARIANT_NAME }}
{% set ns.early = True %}
{% endif %}
{% endfor %}
NOTE - replace 'early' with your own bit of text.
And then in the main body of text, you would add the following 'if statement' before and after the text of your choice:
{% if ns.early %}
Please arrive by 7pm to receive your welcome drinks.
{% endif %}
NOTE - you can also do this for Products and Bands. You just need to replace the Variant Merge Tags with Product and/or Band Merge Tags - see here for the full list of Merge Tags you can use for templates.