As a point of information (and everyone knows this): Sirra, Sirran, and Sirrat are polite forms of address, used when you're uncertain of someone's rank and wish to show respect, or simply wish to show respect to someone in general, if you can claim no friendship or other familiar relationship. ("Sir" is a knight's title, and isn't generally used, though ma'am may also be used in place of Sirra, though Sirra implies a higher rank or level of respect.)
Sirra is used when addressing females, Sirran with addressing males, and Sirrat used either when addressing the genderless mojh, or addressing someone of unknown but very high station (or when addressing someone of which you do not know the gender). Some people only use Sirrat, and it's not considered an insult if they don't use the gender-appropriate address.
