Hi @William48 Airbnb recognizes the fact that many hosts need additional hosts to help out when the listing host is travelling, ill or otherwise not available. Sometime in the future (hopefully soon!) Airbnb will roll out a way to add trusted friends or family as additional hosts. If this feature is available to you, you will see it in your edit listing menu under Management.
In the meantime, I suggest what @Enda0 says but would also add that you instruct your family member to respond to reservation requests and inquiries by first stating that he or she will be handling reservations, check ins / check outs in your absense so people know who they are dealing with. You should change the contact phone number to that of your family member so they can respond to guests' needs. It might be a good idea to introduce your family member in your long listing description so guests will know that this person has be designated by you to handle things.
Also, make very sure that your family member is thoroughly educated on how the reservation process works, especially what the difference is between inquiries and requests and how to respond to them. As the listing host you still will be responsible for any actions your family member takes.
Have fun on your travels!
