Using [list-pages sort_column="post_title"] but excluding part of post_title?

I am using the following shortcode function to list all of my website pages in the footer of my website:

[list-pages sort_column="post_title"]

The problem is that each page has the title of:

Sydney - website name

This means that when I list all pages in the footer, I see a list such as:

Sydney - website name, Melbourne - website name, Brisbane - website name

But what I really want is:

Sydney, Melbourne, Brisbane

Is there a way that I can do this?