Time management and goal setting skills are essential for student academic success in higher education. Meanwhile, the recent advances of chatbots offer new opportunities to support goal setting in a conversational way. In this preliminary research, we investigate the effects of chatbots as a conversational goal setting tool for student learning. We developed a chatbot called Sammy that invites students to pledge their study goals and reflect on their goal completion. We conducted a 7-day study among 70 undergraduate students. Analysis on pre- and post-study surveys indicated a significant improvement in student perceived time management in learning goals. Analysis on student daily check-in with Sammy showed an upward trend of student satisfaction in goal completion and confidence in future goal setting. In the future, we will conduct a more comprehensive mixed-method analysis, improve the functionalities and usability of Sammy, and conduct longitudinal studies