You can certainly inform your customers that you recently interacted with them. Our webapp allows you to send SMS notifications in the following cases:

- When you call a customer, but the call fails
- When you call customers and reach them successfully
- When customers call you and reach you successfully
- When customers call you, however are unable to reach you
- When customers leave you a voicemail
- When you agents miss a call

Here are some interesting articles to help you with understanding SMS notifications:

How Do I Enable SMS Notifications?

How Do I Add SMS Templates?

How Much Do I Get Charged For Outgoing SMS?