Try not to worry about technical details like this. Your side of the process is stressful enough. Good advice was given above about smiling, being yourself, having fun.
Also, another tip I always pass along is to really engage with the member you are talking to. She is just as tired as you are of idle chit chat. Answer with more than a "yes" or a "no".
And finally, remember, keep an open mind throughout the entire process!