If you wish you can customise your signoff in Chain SMS from the default 'Thanks, <your name>'. To do this:
1. Click the menu icon and then click on your email address which is just below
2. On the web page it opens click 'Message Signature' on the left hand side
3. Then to the right of this enter what you would like your signature would be and click 'Set signature'. When this box is left blank or if it's never been edited, the signature defaults to 'Thanks, <your name>'