Applied at Starbucks for part-time barista

I am currently in the job search process and have a potential interview lined up with Starbucks for a part-time barista position. The shift they are looking to fill is from 4:30am to 2pm. I am also waiting to hear back about a full-time technician role at a hospital, which involves working three 12-hour shifts. My hope is to secure both positions, but I need to prepare for the Starbucks interview, especially regarding questions about my availability. One of the pre-interview questions asked if my availability would change within the next six months. I'm considering whether to say that my availability will remain the same or to be upfront about the possibility of it changing if I get the hospital job. I want to be honest but also keep my options open.