I want to response this with honesty. First of all, we didn't accept Nausica's inquiry by our initial discussion. It was two nights in between my two guests and we had family visiting from China on the day of her arrival. Somehow, we received her text and I checked the email that we have a reservation confirmed due to the system glitch. Out of the consideration for what's the most convenient to the guests at the last minute, we decide to accept it not calling Airbnb custom service to correct it.
The one bedroom was a master suite which has its own full bathroom and a queen size bed and a day bed which easily accommodate three guests for the family. As I stated above, we were not aware her reservation till the last minute before her arrival, our previous family guests just left. Therefore, only one bed was ready when Nausica and her family checked in, but, we had all the towel and liner cleaned, just took a few minutes to put them up.
As for the parking space, we never had problem with both sufficient indoor and outdoor guest parking spaces, especially for overnight. I was out of town, my sister who lives close by was in close contact with Nausica via text message for any of their needs. Nausica never raised any issues with her during their stay.
The family left quietly early in the morning left key on the dinning table. Four days later, Nausica emailed me with her complaints. I respond back with a long message thanked her for her openness and communication, explained the background of her reservation, asked if there was anything we could do. She replied four days later said she wanted a full refund. I consulted with Airbnb custom service for advice, we were told if their stay was comfortable, its up to the host to deicide whether give any refund.