Listen to the audio while reading the text.
Native English speakers often transform and delete sounds in their speech in order to speak with more flow and efficiency — to say the most they can in the shortest amount of time.
Here, the Americans tend to delete the central “t” in “wanted” to say: [Wɑ nɪd]
“He really wanted to stay, but he couldn’t.”
— He really [wɑ nɪd] to stay, but he [ˈkʊdn].
Note that a British English speaker will pronounce the “t” as a clear [t] to say: [wɑn tɪd].
centre (UK) – cener (US)
twenty (UK) – tweny (US)
interview (UK) – inerview (US)
international (UK) – inernational (US)
internet (UK) – inernet (US)