Hotel Room Booking System Class Diagram

classDiagram
  class Hotel {
    +String name
    +String city
    +findAvailable(Date from, Date to) List~Room~
  }
  class Room {
    +int number
    +int floor
    +String status
  }
  class RoomType {
    +String name
    +decimal nightlyRate
    +int capacity
  }
  class Guest {
    +int id
    +String name
    +String phone
    +book(List~Room~ rooms, Date from, Date to) Booking
  }
  class Booking {
    +int id
    +Date checkIn
    +Date checkOut
    +String status
    +total() decimal
    +cancel() void
  }
  class Payment {
    <<interface>>
    +pay(decimal amount) bool
  }
  class CardPayment {
    +String cardLast4
    +pay(decimal amount) bool
  }
  class UpiPayment {
    +String vpa
    +pay(decimal amount) bool
  }
  class Invoice {
    +decimal total
    +Date issuedOn
  }
  Hotel "1" *-- "many" Room
  Room --> RoomType
  Guest "1" --> "many" Booking
  Booking "1" o-- "many" Room
  Booking --> Payment
  Payment <|.. CardPayment
  Payment <|.. UpiPayment
  Booking ..> Invoice : creates