Startup Idea: Automated Appointment Finder and Reminder Software

Startup idea to develop a software that can automatically scour through user's documents to find dates and appointments, and feed this information into a to-do list and alarm system, thereby preventing missed appointments.

Something that would help is if there was a program that would search say my documents that would automatically find dates and appointments and put it in my to do list and alarms. I know it would be hard for context but i think 1-2 people could pull off the program. I just tend to forget to write down appointments that are written to me and I end up in trouble.