Scene:
Jenna paced back and forth, clutching her phone. "I can't believe Marcus said he’d take me to dinner. He totally likes me! I just know it!"
Meanwhile, Sarah, trying to suppress a laugh, replied, "Oh yeah? Did he mention he was taking his girlfriend?"
Jenna's smile faltered. "Girlfriend? No way, you're joking!"
Sarah raised an eyebrow, her grin betraying her amusement. “I wish I were.”
Explanation of Dramatic Irony:
• The audience knows that Marcus has a girlfriend, while Jenna believes he is interested in her and is planning a romantic dinner.
• The dramatic irony affects the scene by creating tension and humor. The audience is aware of the mix-up, making Jenna's excitement all the more poignant and awkward as she remains oblivious to the truth, leading to an inevitable emotional clash when she discovers the reality.