How strange. Always thought the first stage of recruitment was "When can you start?"
I wouldn't sweat a Servisair interview, especially at Middleton St George Intergalactic Spaceport. Probably a very short and reasonably friendly chat just to see if they like you, and if you have any previous customer facing experience. All the training and info you need will be given in induction training, but anything you can find out about the airport and the airlines handled by Servisair at MME would be a small bonus. If you can walk and chew gum at the same time, you're in.