SQL & PL/SQL :: Create Tables Error Statement

I'm trying to do is create 4 simple tables. This is my first project using SQL so I'm totally new to it, not just SQL itself but database design/management, including foreign/primary key concepts. I think that's why the errors are being generated due to a duplication of foreign key names (perhaps?) but I really don't where I'm going wrong with the design structure in terms of the FK's and the relationships.

Added the error report in the attachment.

Create Table Hotel
(Hotel_No Char(4 Byte) Not Null,
H_Name VarChar2(20 Byte) Not Null,
H_Address VarChar2(30 Byte),
Constraint Hotel_PK Primary Key (Hotel_No));

Create Table Room
(Room_No VarChar2(4) Not Null,
Hotel_No Char(4) Not Null,
R_Type Char(1),
R_Price Number(5,2),
Constraint Room_PK Primary Key (Room_No, Hotel_No),
Constraint Hotel_No_FK (Hotel_No) References Hotel(Hotel_No));

Create Table Booking
(Hotel_No Char(4) Not Null,
Guest_No Char(4) Not Null,
Date_From Date Not Null,
Date_To Date,
Room_No VarChar2(4),
Constraint Booking_PK Primary Key (Hotel_No, Guest_No, Date_From),
Constraint Guest_No_FK Foreign Key (Guest_No) References Guest(Guest_No),
Constraint Hotel_No_Room_No_FK (Hotel_No, Room_No) References Room(Hotel_No, Room_No),
Constraint Hotel_No_FK (Hotel_No) References Hotel(Hotel_No));

Create Table Guest
(Guest_No Char(4) Not Null,
G_Name VarChar2(30),
G_Address VarChar2(35),
Constraint Guest_PK Primary Key (Guest_No));