After a support session I usually end with "Let me know if you run into any issues." I do frequently wonder if that's the best way to end the email... as what

After a support session I usually end with "Let me know if you run into any issues." I do frequently wonder if that's the best way to end the email... as what I want to suggest is "Email me back directly if something happens, but I don't think anything will." Maybe: "Feel free to ping me directly if you run into any issues."