@Selvi8
I am confused with your post, I don't think you understand how Airbnb works.
If you got an INQUIRY, then you can answer and click on pre-approve or decline. Your guest can book later or not. You can choose to block those dates for 24 hours or not.
If you got a BOOKING REQUEST then you have to click on accept or decline. If you accept then the booking is done, payment is made and your calendar is blocked.
If you got an INSTANT BOOKING then the booking is done, payment is made and your calendar is blocked.
You will be paid from Airbnb 24 hours after your guest check-in.