Sqlite: Insert if not exist, Update if exist

I have a database with 2 tables like this:

cg_resp
id  | name   | email
1   | George | george@yahoo.com

and

equip_info
id  | description  | cg_resp_id 
1   | Caliper      | 1

In the application form I have 2 edit boxes with named edit_resp_name and edit_resp_email

If user insert a new responsible name John with the email john@yahoo.com then during saving I would like to insert a new responsible into cg_resp table

If the user maintain the name George but it's updating the email like george01@gmail.com then I would like to update the cg_resp.id=1

How can be done this in one Sqlite sql sequence?