dialogue writing betweeen teacher and student about assignment a the student was playing traunt

Such exercises are meant to be done by the students using their creativity and understanding. However, below is how you may start the dialogue:
Teacher: So have you brought the assignment today?
Student: Madam, I wanted to; all the work was done on the computer. But, my little brother played some games on it and erased my work.
Teacher: Do not take for a fool, you have been giving excuses all week. First you were unwell, then there was no electricity in your building and now this!
Student: I am telling the truth, please give me another week to submit the assignment.
Teacher: No way! I want the assignment by tomorrow or prepare to repeat this class!