Hello, I have received an email from a professor from the Simon Fraser University (Applicant for the Computer Science program Fall 2015). He asked that the committee has some questions to ask and whether I am available over skype. I have responded by asking the skype id and provided mine as well. I have also requested for the date and time. However, since then its been 4 days and I have still didn't receive any response. I would like to know should I send a reminder email? Or, is it better to wait further? Looking for suggestions and advices. Thank You