Greg: Sienna, have you seen my laptop today in the class? 
Sienna: What did it look like?
Greg: Well it was black color Acer laptop.
Sienna: I guess John was carrying an Acer laptop in his bag.
Greg: yep i remembered. I left it at the cafe while having a cup of coffee with John and he might have picked it up.
Sienna: Yeah, he might have.
Greg: Thank you Sienna
Sienna: No problem
Greg left his black Acer laptop at the cafe today. John was seen with it by Sienna so he probably picked it up.