One of the most common sales assistant interview questions. With this question, the interviewer wants to know your confidence. A sample of bad answer might be "I hope so" this shows your lack of character and confidence. To answer this question, remember to have a perfect knowledge of your skills and try to relate them with your answer.

A sample of good answer might be:

I am sure, I am the perfect candidate for this post because, I am ..... (Here, you can enumerate your qualities and say how them can be useful for the company).