To use the railway internet reservation facility to plan your journey, follow these steps:

1. Visit the Official Website: Go to the official website of Indian Railways, www.indianrailways.gov.in, which provides the online reservation facility. The website offers a user-friendly interface and a range of features to assist you in planning your journey.

2. Create an Account: If you don't have an account, create one on the website. This will enable you to access the online reservation services and save your travel preferences for future use. Provide the required information, including your name, contact details, and a valid email address to register successfully.

3. Plan Your Journey: On the website's homepage, locate the "Plan Your Journey" section. Enter your travel details, including the source station, destination station, date of travel, and preferred class of travel (e.g., AC, Sleeper, Chair Car). Click on the "Find Trains" or "Check Availability" button to proceed.

4. Check Train Availability: The website will display a list of trains available on your chosen route. It will include information such as train numbers, departure and arrival times, travel duration, and seat availability. Use this information to select a train that suits your travel requirements.

5. Select Class and Quota: Once you choose a train, select the desired class of travel (e.g., 1AC, 2AC, 3AC, Sleeper) and quota (e.g., General, Tatkal) based on your preferences and availability. Different classes offer different levels of comfort and pricing, so choose accordingly.

6. Check Fare and Availability: The website will show the fare details for your selected train, class, and quota. It will also display the number of seats available in each category. Verify the fare and availability before proceeding with the reservation.

7. Book Tickets: If seats are available, click on the "Book Now" or "Proceed to Book" button. Enter the passenger details, such as names, ages, and genders, as required. Review the information carefully to ensure accuracy. Make the payment using the available payment options (e.g., debit/credit card, net banking, digital wallets).

8. Confirm Booking: After successful payment, the website will generate a booking confirmation. Save or print the confirmation for future reference. The confirmation will include details such as PNR (Passenger Name Record) number, train name and number, departure and arrival times, and seat/berth details.

9. Manage Your Booking: The website also allows you to manage your booking online. You can view your booked tickets, cancel or modify reservations, and check the status of your booking through the "Manage Booking" section. Enter your PNR number or login credentials to access these feature.

It's important to note that online reservation services are subject to availability, and tickets are booked on a first-come, first-served basis. It is advisable to book your tickets well in advance, especially during peak travel seasons, to secure your preferred travel dates and class of travel.

By utilizing the railway internet reservation facility, you can conveniently plan your journey, check train availability, book tickets, and manage your reservations online. This saves time, provides flexibility, and ensures a smooth booking experience for your train travel in India.