I'm sorry, but I'm going to need a bit more context on what you are trying to achieve here. If the goal is to read the user's name and then display the message, here is how the code would change in that case

```
b = input("what's your name ?")
print("Hi ", b, " this is infinity loop !")
```
It is also worth mentioning that the spaces after the word "Hi" and before "this" are unnecessary and will result in double space since print adds spaces between the arguments given to it by default, you can change this by adding another argument to the print `sep=""` to set the separator to the empty string.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence