Hi {Name},
Congrats on joining our service! Let me keep this brief and informal, so you'd never guess it was sent by a robot. I was just checking in to make sure everything is in order! You can email me back at {first}.{last}@dumphipsterstartupwithidiotapi.com if you have any issues. I may or may not get backto you in 6 months. Thanks! and Enjoy!
- You friend,
Some vague customer service title,
{Name}