Hello Bella246 and welcome to the forum. You are asking a very specific question, the answer to which will probably be seen as commercially sensitive by the carrier in question. Accordingly, you cannot expect a member of their staff to breach their terms of employment and tell you. You might receive a Private Message (PM) but do not be surprised if no answer arrives.
You will see that there is a detailed thread running in the forum about this topic:
http://www.pprune.org/passengers-slf...umstances.html and that will indicate how complex a subject this is.
I hope you stay and join in other conversations.