Call the GUI window so that players can extend the lease term and choose a room number it is not clear where and to which room belongs ID
GUI to extend hotel staySuggestion
You can turn on the arrows that point to the rooms for players like when talking to the NPC by default. I added command to /hotel_extend HotelName which adds the duration to the current expire time and charges the rent again. I agree some way to know what room number is which would be helpful I will also look into this.