There are several methods to achieve this.
One member can transfer points into the other member's account.
Each member can make part of the reservation and have them linked.
You get into difficulty when you have an odd number of days and want each member to pay points for 4 1/2 days. That is a problem. you can only remedy that by transfering points from one account to another for that half day.
"From each according to his ability, to each according to his needs", Karl Marx,This has failed every time it has been tried, why do we still have liberals?