Contact the new job and let them know you need to reschedule the training because you have not been able to schedule someone to cover you at your current job. The new employer must know you are still working elsewhere and cannot be at their beck and call until that job ends.

So I put in my 2 weeks at my part time job because I got a full time job with better pay. They need me to come in tonight for training but I'm scheduled for my part time job also. I've texted every one at my part time job and no one can cover my shift. What do I do?? Part time job is hosting and full time is serving. Help??