In most cases, once you make an Instant Tutoring request, teachers will immediately accept your request. However, there are situations in which your request will be unsuccessful as teachers may receive multiple Instant Tutoring requests from many students at the same time. A teacher can only accept one request from one student. Once a teacher accepts a request from a student, all other requests are automatically declined.
If your request is unsuccessful, try making another Instant Tutoring request with another teacher offering Instant Tutoring. There are always new teachers from all over the world that will "turn on" their Instant Tutoring Availability.