Why are there lines at the hotel front desk?

Does the questioner want to ask "Why is it prompted that the hotel front desk is in line when contacting the hotel front desk?" The front desk staff has a heavy workload. Since the hotel front desk staff has a very heavy workload during the peak check-in period, they do not have time to provide this service. However, they can be assisted by waiters in other positions, such as lobby cleaning, concierge, etc. This will cause other guests to show that the hotel front desk is queuing when they call.