Step1: Click on Calender Icon.
Step2: Select the appointment which you wat to modify click on pen.
Step3: If you click on this can icon then that appointment will get delete.

Step1: Once you click on Modify button if you want to change the time you can change time from here
Step2 : Now click here to check the provider time is he available on that time.
Step3: Now click on Modify time.
Step4: if you want to modify & check in appointment then click here.