If you can't make it or need to cancel the call, it's important to let the researcher know about the cancellation or ask them to reschedule the interview at least an hour before the scheduled event, and preferably within a reasonable timeframe (1 business day). This allows the researcher to make appropriate arrangements and adjustments, and also shows respect for their time and effort in setting up the call.

Remember that research is a collaborative process, and your participation is crucial to its success. By showing up on time, you are not only helping yourself but also contributing to the development of better products and services. If any technical issues arise during the call, please communicate them with the researcher as soon as possible so they can troubleshoot or find alternative solutions.