This is a true story from the Japanese Embassy in USA!!!
Some time ago, Prime Minister Mori was given some Basic English conversation training before he visits Washington and meets President Barrack Obama...
The instructor told PM Mori, when you shake hands with President Obama, please say, 'How r u?' Then Mr. Obama should say, 'I am fine, and you?' Now you should say, 'me too'. Afterwards we translators will do the work for you.
When Mori met Obama, he mistakenly said, Who r u?' (instead of 'How r u?').
Mr. Obama was a bit shocked but still managed to react with humour....
'Well, I'm Michelle's husband, ha-ha...'.
Then Mori replied, 'Me too, ha-ha'.
There was a long silence in the meeting room after that short conversation.