How would you approach a customer or guest who had a problem?

The question can be swapped a bit. If its a customer support, probably the customers will contact you for any assistance. In such a case, you are about to bring in a solution for all the queries of a client/customer. While, you have to pose accordingly to make your customers satisfied.

- Though your client is found irritating or so, you still want to sit back with patience on hearing the statements/queries made.
Else, it might end up your business with them which in turn makes them to give a negative suggestion to their friends who might be trying to opt your service in future.

- Should be having the attitude of apologizing whenever there is any inconvenience found from your side.

- Pay more attention when your customers are trying to make their suggestion about your products or services. Literally, this can sort out the similar happenings in future.

If these are taken in prominence, perhaps you don't have to be longing for the customers. Instead you would be filled in with the clients and aiding them back in a full fledged way.