When applying for city bus, how long in advance will you send a text message to confirm the success of the reservation?

The city bus belongs to A3 driver's license, so it usually takes about 1-2 days to make an appointment for the exam. Will the reservation succeed? But there are special circumstances, because it depends on the specific progress of the audit. For details, please check the progress of network operation in Traffic Management 12 123, subject to the results displayed in the system. (Sometimes I can't send a text message. )