I approached her sliding glass window and stood in back of a gentleman whom I assumed she was helping. After about three minutes, I realized he was waiting for the office manager and she could have acknowledged my presence. I stepped up to the window; she did not say good morning; she did not smile; she just glared at me. I started to speak; she pointed a finger at a clip board with a paper to fill out. I placed the completed sheet in front of her, perhaps expecting a thank you or a smile or at least 'have a seat; the doctor will see you soon'.