Quakers love to be sociable and chat to other birds and family members. Make sure she has plenty to watch and mental activity to occupy her. Use feeder toys so she has to work to get her food (and occupy her mentally) and toys that your change regularly. Also, train her regularly, as the mental stimulation prevents loneliness and boredom. Finally, never shout at her to stop chirping as this will reward the behavior and make it worse.