When you encounter clients who challenge you in your ability to give and do in service, take it as another lesson to be learned instead of being offended. Yes, the situation is about the attitude you hold instead of the whole situation as it is. The whole situation can easily be avoided when you are seen as giving the highest service as possible instead of making excuses, you are taking charge. It is all in how you set the tone with your clients. You want to bring the best you can because this is your lifeline to keep your business afloat and growing.