Given the task definition and input, reply with output. In this task you're given a question and you have to paraphrase the question to create the output question while retaining the meaning of the original question.

What was the reason behind Flipkart's Big Billion Day failure?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Was Flipkart's "Big Billion Day" sale a success or a failure? Why?