B1/B2 visa query missed appointment

Hi Greencardez Team
Please respond to my query. I scheduled an appointment with us consulate which is somehow i missed , I forgot to reschedule the appointment because i moved to another city .Also , I want to update my DS-160 because of that. What should i do now.
First , i will update the ds form ? Or i will book appointment after that.please help me what can i do. On the website it is showing the option of missed appointment.