Hooked on Phonics doesn't work for everyone.

When I leave work I am usually exhausted. Yesterday was no exception. I had to stop by Walgreens to pick up a prescription that I had dropped off three days earlier, so I knew that by now it would be ready. When I got there two very long lines of people were at the pharmacy counter. After about fifteen minutes it was my turn at the counter. The woman that had been in front of me was now standing to my side waiting because the clerk told her that her prescription was not ready and when she insisted it must be ready since it too had been called in several days prior the clerk told her to simply stand by and she would talk to the pharmacist about it when he got a spare minute. I told the clerk that I was there to pick up my prescription and gave her my name. The first two initials of my last name are Li. The plastic bins that they keep the prescriptions in at Walgreens are labeled with the first two letters of the last name. She looked in the first bin that was marked LA-LH. She did not look in the second bin which was marked LI-LZ. She then told me my prescription was not ready either. I told her that it must be because it had been called in three days ago. She then said she would see if it was in pending. While she was doing that I started staring at the bins. Sure enough I could see my name clearly marked on one of the prescriptions in the LI-LZ bin. When she got back and told me that it wasn’t pending I said that I knew it was ready because I could see it and I pointed to it. She then got an attitude and said that I was wrong. By this time my patience was wearing thin. The conversation went as follows:
Me: My prescription is right there in that bin, the one marked LI-LZ.
Clerk: No it’s not. That bin starts with LL.
Me: No it doesn’t. That is an L and an I.
Clerk: No it isn’t. It doesn’t have a dot. It has two L’s.
Me: That is a CAPITAL I! That is why there is no dot. It is a capital I.
Clerk: Lady, I know it doesn’t have a dot. It’s an L, as I told you.
At this point I said nothing and just stared at her. I was about to blow a head gasket. Realizing at this point that explaining the alphabet to her was going to be like explaining physics to Forrest Gump I decided to stop trying. I then said in a very firm voice that I could see my prescription and if she couldn’t manage to find it with me pointing to it then I would gladly go behind the counter and get it for her. She then rolled her eyes and looked, of course found it and then began slamming the keys on the cash register because she was obviously agitated. The woman beside me had witnessed the whole encounter and realized that her missing prescription probably couldn’t be found because of the clerk’s lack of skill. She asked if the clerk would mind checking again on hers as well. Magically she managed to find it in the same bin.