Why siri anther person voice

HI Sagarpp,

Welcome to the Apple Community, where some of us do our best to help each other.

Wondering if I understand your question correctly ...

Thinking, from your question, that you are hearing a different voice from Siri, than the one you expect ?

If so: Apple Support have an article (below link) that tells you

how to customise Siri's voice to your own choice.

or

If Siri is responding to someone else's voice rather than your own ?

Change Siri voice or language:

(or scroll down for

Set up "Hey Siri" to help Siri recognize your voice:

https://support.apple.com/en-us/HT208316

Did you notice:

Apple Support have a "Related. link" about Siri, above your question on this discussion page.

It may help you know more about Siri.

And / or

If "Hey Siri" isn't working on your iPhone or iPad

If Siri doesn't respond when you say "Hey Siri," here are a few things to check.

https://support.apple.com/en-us/HT207489

Hope this helps you

or

Please feel free to "Post" to us here again.