Conditionals in Email Template

[Developer]

We need to add if {} else {} conditional, when a new ticket is received.

e.g. based on ticket priority, would like to return different message on mail.

{% if {ticket.priority} == 'low' %}
Since you marked this ticket as a {ticket.priority_language} priority we will have a resolution of this issue in 10-15 business days.
{% endif %}

{% if {ticket.priority} == 'medium' %}
Since you marked this ticket as a {ticket.priority_language} priority this means that this issue is impacting business but not severely and it can wait to be resolved in about 5-10 business days.
{% endif %}

{% if {ticket.priority} == 'high' %}
Since you marked this ticket as a {ticket.priority_language} priority this is an issue is impacting business greatly and needs to be fixed ASAP but we may need to take 1-5 business days to resolve it.
{% endif %}
 

Is this possible already, if not what would be needed to customize it? let know, thanks.