@Nick563 I suggest opening a ticket with CS to let them be aware of the situation, that way if she asks for a refund you have a better chance of getting paid.
@Nick563 I agree with @Beth80, send a note to airbnb. If she tries for a refund they'll see she wasn't trying to contact you. I had a couple similar ones. One guy booked for 9 days, but didn't show til day five. Another woman booked for 4 days and left never to return after the first day. With day five guy I sent him a $5 a day refund for utilities he didn't use and a note saying I hoped the rest of his travel plans went more smoothly. I wrote the woman who left, she was here for a family reunion and her cousin insisted she stay with them. Sent her the same refund. Maybe some folks actually understand that asking for a refund when their plans change isn't reasonable. But be proactive. And don't panic, anything could have happened.
Paige seems to have misread your comment, which conveys that Guest has messaged daily.
If that's correct, as long as the messages are via the Airbnb 'Conversation', I wouldn't be pro-active to contact CS since the evidence would already be there if necessary.
If Guest wants to apply for refund, you can either negotiate with her something; and if not successful, Airbnb can mediate and make the final decision.