So as I was

 Finishing up the transaction a person came in the store the clerk said hello 

So I was

 Telling that clerk how i intended to use but forgot 

Got another

 5 dollar thing that you can use on the Saturday 

Except

 I was at store this weekend and forgot to use the 5 dollar thing 

And that

 Was it 

How he was doing

 And briefly looked at him he said how he was 

Thought about

 But went on to ask him 

At that moment

 I was like okay 

And the young man said

 Hello how are you 

I was at store

 Checking out 

These things happen

 So quickly