Write a Selenium test script in Python (using PyTest or unittest) that automates this scenario. Your test should include:

• Validating that the search results load correctly for the subject entered.

• Verifying that the modal opens with available time slots after clicking “Book Session”.

• Booking a session and confirming that the toast message appears.

• Navigating to the "My Sessions" page and asserting that the session is listed with the correct tutor name and subject.

• Use appropriate locators, waits, and assertions.