It is necessary to ask the client about the appointment since, depending on the schedule that he has available, we can schedule his appointment so that it is done with a certain type and does not waste much time, when a client is spontaneous, what should be done is to offer him the services that are available without scheduling and give them the waiting time more or less
For waiting customers, one could look for an entertainment strategy in which time passes quickly.
could be some activity or something snack