Place it at the end of a compliment scene, after the setup has built up, then follow it with a reaction sound to sell the moment. Pair it with a confident rizz sound before the line and a surprised oh my god reaction after it for a complete exchange.
About this sound
This short clip plays Siri's calm synthetic voice delivering the line 'You have such a beautiful face' in a slow, deliberate tone. The unexpected compliment feels flattering and a little awkward, which makes it funny rather than sincere, and perfect for catching a listener off guard with sweetness instead of a joke.