how to send email to none account's email address using data update event?

Dear Sir,

I have built up a event management app and a event seats booking app in kintone. User can book the seat of event. Admin approves the request by changing status.

Now I want to send a confirmation email to the user when his/her request is approved. How is it possible?

Hello Salman

Using Zapier is probably the easiest way to do so.
I provided the Zapier links below:

I hope this helps.