Wyzant has a policy to allow new students to meet with a tutor of their choice and if they don't find the tutor meets their needs, they may contact another tutor without charge (as I understand it). This is a customer-friendly policy that makes students feel more comfortable in contacting a potential tutor. However, it works both ways. A tutor will also need to review the information a potential student provides to determine if possible how well the tutor can provide the help requested. The problem lies when the student gives no information.
When a student writes only "I need help", or "when can you meet", or writes no message at all, it is impossible for a tutor to determine if he/she can help. A tutor must determine the student's specific subject and area of need, level, school or work situation, possible schedule (e.g. evenings only), and other factors to see if he/she can help. It becomes a waste of time to write back and forth when the student is cagey and seems unwilling to provide honest information or doesn't trust this system.
If you are contacting a tutor for a child, likely you will provide this information. But when adults write for themselves, I often find minimal or no information given without asking (sometimes more than once). Please keep in mind that a Good Fit applies to tutors also; you must give them enough information to determine if they will pursue the inquiry. Otherwise I'm afraid you are wasting everyone's time.