Madam didn't ask me.[change the voice]
To change the voice in your sentence from active to passive, we need to switch the positions of the subject and the object. The subject "Madam" will become the object, and the object "me" will become the subject. Here is the sentence in the passive voice:
"I wasn't asked by Madam."
In this sentence, the verb "asked" remains the same, but the addition of the helping verb "wasn't" changes the sentence to passive voice.