Through the free hotline, which officially made its debut last week, Luu and other project employees calm anxious callers and even elicit laughs from those who don't know where else to turn.
Every caller did no enjoy the free hotline. 
mnli hypothesis: Every caller did no enjoy the free hotline.  premise: Through the free hotline, which officially made its debut last week, Luu and other project employees calm anxious callers and even elicit laughs from those who don't know where else to turn.