The only reply you will get is the affirmative one. The HR department at CHC GO gets over 100 apps a day most of which are not appropriate to the cause. So I believe there is a disclaimer somewhere on the website that says no reply means " thank you for your interest in CHC GO blah biddy blah blah blah"
Second Officer positions are often filled by Nationals in the country they are operating in so there are limited positions for touring SO's.