* Tense inconsistency: The phrase "Pretty soon" implies future tense, but "saying" is present tense.
* Missing subject: "Have an adventure" is a verb phrase, but it lacks a subject. We need to know who is having the adventure.
* Informal language: The use of "saying" is informal and doesn't flow well in a written sentence.
Here are a few ways to correct the sentence:
* Formal: "Pretty soon, she will say, 'Have an adventure!'"
* Informal: "Pretty soon, she'll say, 'Have an adventure!'"
* More concise: "She'll soon say, 'Have an adventure!'"
The best option depends on the context and desired tone of your writing.