Oh how very English and I'm still not sure how to respond!

Mother-in-law: "Then I had to stop and get myself a drink, didn't I?" They just stick in random "didn't I"s at the end of sentences. I'm never sure what to say to that. "Yes"? "Of coures you did"? Nothing?
And then there's the famous, "Hi, you alright?". I think the first time I heard that, I kinda stuttered and said "Yes, I'm alright." and then turned to my husband and asked if I looked upset or something. He kindly informed me it was just like "Hi, how are you?" in the US. Just a pleasantry.
Those two things stick out as very English to me.

-Shellie