Please test the code before you use on anything that goes live and please let me know if you find any problems.
{% if subscriber.next_event == "syd" %}{% assign city = "Sydney" %}{% assign date = "14th March" %}{%capture description%}The WooCommerce REST API, Drip's Custom Dynamic Content and Liquid, a polygamous marriage...{% endcapture %}{% elsif subscriber.next_event == "bne" %}{% assign city = "Sydney" %}{% assign date = "14th March" %}{%capture description%}The WooCommerce REST API, Drip's Custom Dynamic Content and Liquid, a polygamous marriage...{% endcapture %}{% endif %}