Years later they told me they were very nervous too, because they were going to do their very first interview with a REAL games journalist! (theswitcheffect.net)
Many companies choose this method for first interviews for prospective interns. (careerdigital.com)
The article provides two samples that can be personalized for after the second interview thank you letter, however they are good to use after first interview as well. (job-interview-site.com)