Alarm / Reminders

For my technicians they will have multiple connections going to support a number of users. Sometimes a technician has to wait for something to install/happen so they move onto the next user to support. What would be awesome is in the toolbar have an alarm/reminder to come back to the user they left whilst its installing or waiting for something to happen. We've had a few occasions where the technician has forgotten to go back to the user but with an alarm it would prompt them. All it needs to be is a simple drop down and select a time like 5, 10, 15 or custom and then when that event arrives it plays a sound or sends an email.