This is an excellent way for them to make the transition from home to classroom, from leisure time to academics. Schedule a regular time to respond so that you can have your responses recorded in their journals by the following morning. Soon you will find your students rushing to read they will want to know what you have written. Dialogues are stifled if one of the participants is constantly correcting the other. It doesn't matter whether the dialogue is through the air or in writing.
Constant correction is a damper on expression.
Instead, repeat a misspelled word naturally when the response is generated. In the following entry, Janie is unclear in her description of an incident. Notice how her teacher responds. She does not correct language but models it, maintaining a natural conversation, and adding a topic at the end. Boy with wild three 3 girls don't want boy friends crazy then lot more crazy.