Provide the theme summaries for the following conversation: 

#Person1#: Who's singing in your home, Jim?
#Person2#: It's Ellie and her friends.
#Person1#: Who's Ellie?
#Person2#: She's my little niece. It's her birthday. They're singing ' Happy Birthday '.
#Person1#: Oh, I see. how old is she?
#Person2#: She's ten.
#Person1#: I suppose they're playing games.
#Person2#: Oh, yes. Ellie was playing games all day yesterday. By the way, Alice, when's your birthday?
#Person1#: Today.
#Person2#: Today?
#Person1#: Yes.
#Person2#: Well, imagine that! How old are you?
#Person1#: Eighteen. Some friends are having a birthday party for me tonight. Do you want to come?
#Person2#: Very much. What time?
#Person1#: About 6.
#Person2#: I'll be at your house at about five thirty. Happy birthday.

Summary: 
Jim tells Alice that it's his little niece Ellie who's singing at his house. Alice tells Jim that today is her birthday and invites Jim to her birthday party tonight.