Siri is not responding on voice on apple watch series 3

Hello,

If Siri doesn't respond or asks you to try again

Try these steps. After each step, see if Siri responds:

1. Check the Internet connection on your Apple Watch.
2. On your iPhone, see if Siri is turned on. Tap Settings > Siri & Search, then turn on Listen for "Hey Siri" and Press Home for Siri. Your Apple Watch mirrors your iPhone, so you don’t need to check your watch.
3. On your Apple Watch, see if Hey Siri is turned on. Tap Settings > General > Siri.
4. Restart your Apple Watch.
5. On your iPhone, go to Settings > Siri & Search and turn off Listen for "Hey Siri." Then turn it on again.
6. See if the microphone or speaker on your Apple Watch is blocked. For example, if your device has a protective case, remove it.
7. If Siri doesn't speak on Apple Watch Series 3, you might need to download its voice.

If Siri still doesn't respond, contact Apple Support.

From:

Use Siri on your Apple Watch - Apple Support