Hello Hermeh!! I have played with you in a few games so I know who you are. heee
If only you were using Emmy Rossum as Hermione I have an icon of the two of them together! SEEE!!
But yes, Lisa would probably know Cho. In the books she had many friends from her house so can they be friends? She would be friendly to Parvati and Hermione. She won't talk much to Narcissa and Cho didn't take the NEWT Astronomy class but she would still know Sinistra since she took her class until then.