there is a mid way here.. a lot of your cell phones both Android and Iphone have an "Auto reply" mode for texting and when in do not disturb. you set up a msg like "I am currently not available to take your call but will return your call as soon as possible" if I got a txt msg back like 1-2 minutes after I texted the lady about confirming with the above message then I can wait a bit.. but once 1 hour is remaining on the scheduled time and no call back.. that is it.