The anti alcohol spike she had injected into her leg earlier, must have reacted to the extra oxygen content of the air. The injection worked in part by opening up the alveoli to be more receptive to oxygen. Walking into a room with a higher oxygen content than normal had caused her to react by coughing. She took a few breaths through the mask and she started to breath normally again.
"Thank you" she smiled and handed back the mask and took the flower from him. She smelled it and was mildly surprised and taken back by the scent. There was a difference between it and the normal perfumes that she knew most women would wear. "What species of flower is this?" She asked as she followed him out to the elevator. She took note of her comm units slight buzz letting her know she had received another transmission. "The smell is very unusual, does not have a synthetic quality to it."