Embarrassed moment

This is a sunny day, Annie and I went to city centre to buy face mask after lessons. We were in a good mood during shopping. Although the shop assistant of cosmetics shop can't speak English and we can't express very well, we still bought the most suitable face mask for us.

when we were leaving the department store, we came across June. I and Annie were very excited and glad to meet June by accident. After saying hello to each other, June asked us why we were here, we said we just bought some mask. Similarly,we asked the same question to June. He replied that he wanted to buy some pencils from here and he will have a lesson after a while. I wanted to say " please do your own bisiness, we are leaving now and hope you have a good time this afternoon." Unfortunately, I forgot how to express my mean politely and correctly. I try my best to think about how to say, but my brain seemed to become blank at that moment.So I asked Annie for help, maybe she were nervous,too.She also didn't know what should say
at that time. Embarrassed moment usually seems to be a long time in my feeling. I felt June seemed to wait for a century. Finally,we just said "see you!" to over the embarrassing talking.

I was shocked by this matter, I should think about my spoken English seriously. If I had practise it everyday after class, I wouldn't have done that stupid thing. I should say English all the time and use it like my mother language.Practice makes perfect. Beside this,I hope to learn some conversational sentences to help to communicate well.