I think that it is the Heroic Couplet.
Although I have yet to reach this question in school, I am a huge fan of poetry and I know most of the "devices". I hope this helps!
Answer:
We are waiting in the office to get your letter of june 18.
Explanation
I know added a extra word
Transition sentences or words
"Try our raspberry and chocolate cupcakes." is the statement that carries the mane idea of seelung cupcakes to the audiences attention.
