Online Booking for your Investor Relations or other Event Call. Whether or not your organization is already a Momentum Conferencing customer, we can provide you with full service in booking, coordinating and running your highest profile conference calls - your Event Calls. You will receive your Event Call Confirmation via e-mail within one hour if your request is submitted between 8 am and 5 pm Pacific Time, Monday to Friday; or within one hour from our Start of Business on the next business day.