A : "excuse me, do you know whose took my umbrella?"
B : "i don't know about it. actually, what had happened to you umbrella?"
A : "i lost my umbrella"
B : "i'm so sorry, i don't know about it"
A : "yeah, it's not a big problem, but it's so cloudy here. i think it will be rain"
B : "you can borrow my umbrella, i will use my raincoat"
A : "are you sure?"
B : "yes i am"
A : "thank you so much"
B : "you're welcome"
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