Over a month ago I sent out an email to 14 women about my friends bachlorette party to Chicago (some friends already live out there, myself, the bride and some other are a plane ride away.) I was SUPER specific about renting an air bnb/homeaway and if you say you are coming that is your commitment to the group to pay your portion, even if something comes up. Asked everyone to respond by a certain date but gave everyone a month. One of the brides cousins (I've never met if it matters) never responds. I email her if she's joining and she says "I want to but I can't promise anything."
What do I say/ how do I say it? Its already difficult to find a place in the city big enough for 9 women. I don't want her to have to sleep on the floor/couch but i also don't want to drive up the cost for everyone else and I NEED to book something quickly (competing with lollapalooza). I do understand its a lot of money, I just wish people knew how to say "no".
ETA: I did mention estimated prices in my original email for both flights and lodging (If 4 of us come I will find something that is less than $150, if 7 people comes I will find something that is less than $xxx, if all 14 come...)