Provide the theme summaries for the following conversation: 

Yvonne: How's uncle Sam?
Lucy: He's OK, just came back from work.
Chiara: We were worried about him. Dad told us he was in hospital.
Lucy: It's nothing serious, don't worry! How kind of you to write to us!
Yvonne: Auntie, you're like our second parents!
Lucy: <3
Chiara: <file_photo>
Chiara: It's us in Chicago 2 weeks ago.
Lucy: Wow, you looked stunning! 
Yvonne: Thanks, it was at our cousins wedding.
Lucy: And how are you girls? Any nice boys in sight?
Chiara: Yvonne is dating a hot Argentinian!
Yvonne: Chiara, stop it!
Lucy: Oh, come on! Tell me the details!

Summary: 
Uncle Sam was in hospital, but it was nothing serious. He and Lucy are like second parents to Chiara  and Yvonne. Chiara and Yvonne were in Chicago 2 weeks ago at their cousin's wedding. Yvonne is dating an Argentinian.