Selected intern's day-to-day responsibilities include:

1. Collating list of potential clients
2. Making a pitch deck
3. Calling clients to pitch our services and scheduling demos
4. Following-up on leads
5. Generating new leads
6. Dealing closures and achieving sales numbers

In your application, attach your resume, mention your past experience and answer why you should be hired for this internship.
This is a Sales internship. Only passionate candidates who love selling - generating leads, cold calling, giving demos and closing deals need to apply.