Need to change the name of WordPress database

Hello Sajid,
It took me some time but I created new pages for all of my previous services. That bit is done. I now have 3 databases on phpmyadmin. I tried to create a new database to which I want to import everything from the old database, but I ran into trouble. I would like to have just 1 database on there named bangkok_nail_salon. I do not mind if you have to delete it and recreate a new database of the name or use any method you prefer.

The database which contains the IMPORTANT STUFF is glitteratinaillounge_com_1

The third database named glitteratinaillounge_com should be deleted as well.

I have read all the instructions and have tried importing and all that already. It did not work and I would like to ask for your help.
Please let me know if you can do this and I will send you my phpmyadmin credentials right away.
We will need to work together so we can change the name of the database on the wpconfig file so have minimal down time.
Thank you.