No worries. If you have a bunch of different success messages too - context specific stuff based on what they filled in, you can handle that with other conditionals (maybe a different segment at the end (you can disguise them a bit by using a digit or something instead of a word like “success”). And once you throw in an early conditional parsing add-on like ifelse or switch (both from croxton on devotee.com) then you can do this without adding unnecessary hover head to your page. Quick example, again assuming in this case that segment_3 is your “success” segment:
{exp:switchee parse="inward" variable="segment_3"}
{case value="success1"}
Success message for form result 1
{/case}
{case value="success2"}
Success message for form result 2
{/case}
{case value="success3"}
Success message for form result 3
{/case}
{case value=""}
Display the form since success segment is blank
{/case}
{/exp:switchee}
The above example uses switchee to do the conditional checking in place of using multiple if:else statements, which add weight to the page load. Switchee matches the cases first then only parses the content between the case statement that is true.