You have worked in your present company for five years.
Yes, I do.
Why do you want to resign?
As you know I serve as a secretary in my present company, I really want to look for a more challenging opportunity.
What kind of work are you interested in?
Just as you advertised in the newspaper.
So you are interested in our company.
Yes, what's more, your company is one of the largest and best trading companies in this line of business.