I'll get my hat. Just lovely, Pet. Come along, Junior. In the format I've chosen, character names are capitalized, dialogue follows the usual mix of capitals and lower case letters. Sound effects, music cues and descriptions of action are in parenthesis.
Dialogue is the most important aspect of radio dramatics.
It describes everything the audience cannot see. Since the audience sees nothing, the dialogue describes everything. Voice characterization is the unique sound of the character's voice. An old man sounds like an old man. A child's voice is higher pitched, immature.