Late Reciever

Well, you know my friend (the unreliable one) we kinda bought up the subject of her actually turning up to a party and what she said was...
"I am coming....if you dont beleive me you can talk to my dad"
It's not the fact we don't belive her, its just the fact she's so unreliable and will back out last minute AND there is no point of buying vegetable curry if none else is going to eat it AND she dosn't even like asian food and shes pakistani - I don't really understand that but yes! So, if she dosn't like asian food, and she's vegetarian - which is a bit of a problem because asian food is actually horrible tasting and i don't think she will turn up then is theres really any point of her being there?