Is this your first visit there? First neuromuscular opinion? How was it booked? As a consult/ 2nd opinion?
Definitely read the sticky on 2nd opinions at the top of this subforum.
Every place does things differently. My experience was that I was seen first by the fellow who did a detailed history and exam, and presented her findings along with the relevant medical records to the attending who then also asked questions and did an exam then told me her thoughts and plan. I would expect an assistant would see you first of all and take basic info and do a screening breathing test.
Do not be surprised if another EMG is ordered as a lot of places do not want to rely on outside emg results unless they happen to know that person's work really well