Yes, you can cancel a chat request before it starts. You'll be able to do this 3 minutes after you send the request. The person you're trying to chat with has a total of 5 minutes to respond. We chose the 3-minute point for cancellations because it's usually enough time for them to see and respond to your message. If we allowed cancellations any sooner, it might reduce the chance of them getting back to you. We do recommend waiting the full 5 minutes if you're able to.