I'm trying to get a job in walgreens and I already sent my application last week. I'm trying to write a letter of interest, but I need help because I have no experience in retail or in customer service. I'm trying to apply has a tech and if there are no openings I' m still will apply for their clerk positions. So can someone help me write a letter of interest? What do I put down as a substitute if I don't know the managers' name?