My guests are asked to be fully vaccinated before booking. However a guest who is coming in 7 days time has NOT confirmed his status, although I have now messaged him twice for him to confirm this. As a last resort I have messaged him to say that I will have to cancel his stay if he does not reply. What else can I do? For own and other guests safety this, to me, is a priority. Your help. advice or suggestions would be truly appreciated.