<human>: This fuck up happened about 6 years ago when I had just moved to Canada. I got a job in Mcdonalds and was pretty nervous as English is not my first language. I worked that job for two years and had many funny fuck-ups (nothing major don't worry) but here's the one I will never forget:

So this was a year after I started. I was in drive thru handing out orders. Everything was going great despite being very busy (Saturday lunch rush, yikes). No annoying customers so far, so even better. I was having a good day too and was feeling very motivated compared to most days. Cue the fuck-up - I was handing out an order and the customer said a warm "THANK YOU!"

**Let's PAUSE for a moment. Now, I usually answer them back saying either "you're welcome!" or "not a problem!" And I was doing a whole lot better with the English language thing as I have been living in Canada for a year when this happened** 

Now, back to the fuck-up: 

So I went to answer "You're welcome!" BUT my brain did not cooperate with me that day, my damn brain decided mid-sentence that I should say "not a problem!" instead. So what I ended up saying to the customer was, *"YOU'RE A PROBLEM!"* 

FUCK. I realized what i just yelled out and I really meant to apologize to the customer but she drove away immediately, probably because of what I said to her.

Luckily, not one of my co-workers or managers heard me as my head was kinda peeping out of the drive thru window when the fuck up happened. The noises in the kitchen and at the front counter probably drowned it out. And thankfully I didn't get any customer complaint either.

To the lady, if by any chance you read this, I want you to know that I'm very sorry and that YOU ARE NOT A PROBLEM! :(

Can you condense the text into three sentences or less?
<bot>: Meant to say "you're welcome!" to a customer, instead my brain told me to say "not a problem!" mid-sentence, ended up saying "you're a problem!"