Request to refrain from smoking
Please don't smoke here

Reported speech transformation
When reporting the statement "Please don't smoke here," said to him, it can be transformed as follows:
I requested him not to smoke there.
In reported speech, the imperative sentence "Please don't smoke here" becomes a statement requesting someone not to smoke in a specific location. The pronouns and verb tenses may also change based on the context of the conversation.

Explanation
Reported speech is used to convey what someone else has said without quoting their exact words. It is important to pay attention to the changes in pronouns, verb tenses, and sentence structures when transforming direct speech into reported speech.
In this case, the imperative sentence "Please don't smoke here" is transformed into a statement requesting someone not to smoke in a specific location. The verb "don't" changes to "not to" in reported speech, and the pronouns may also change based on the context.
When reporting someone else's words, it is crucial to accurately convey the meaning and tone of the original statement. By using reported speech, we can effectively communicate what was said without directly quoting the exact words.