My daughter will be 3 coming April. She talks well with me and hubby. But if anybody eg, neighbour, pedestrian say hi to her, she doesn't respond. That's my only concern. She also won't say bye. She's going to play school. All other children if I say bye, they respond and tell me bye. But she shows only hand movements and doesn't open her mouth. If anyone ask her name, she just smiles and doesnt tell.This is not always but most of the time. My neighbour says she's feeling either shy or fear. How to overcome her fear or shyness?