Format keynote slides with specific conditions

Question

I am new to AppleScript'ing. Need your help to achieve my task.

I want to automate formatting my keynote.

Below is the sample keynote slide

My requirement is:

My AppleScript should loop each of the rows and

1. If it see "Bullet" it should get "Bullet"(bold)

2. Any extra new lines should be deleted.

Can anyone please help?

Thanks, Javeed