for iOS 9.1 software

Create email and events: When you start adding people to an email
or calendar event, proactive assistant suggests the people you
included in previous emails or events.
Receive calls: If you get an incoming call from an unknown number,
proactive assistant lets you know who might be calling—based on
phone numbers included in your emails.
Leave for an event: If your calendar event includes a location,
proactive assistant assesses traffic conditions and notifies you when
to leave.
Turn off contact suggestions. Go to Settings > Mail, Contacts,
Calendars, then turn off Contacts Found in Mail.