@Lisa5773 We had a similar situation with lockdown. We sorted it by
1) getting the guest to message asking to cancel
2) Calling customer service to ask for a mutual cancellation because, since the customer booked, it has become illegal for them to visit you.
3) Ask them to confirm zero penalties and property will not be blocked.
This worked for me with the second rep I called.
Alternatives are available if above doesn't work