<human>:  Can you tell me the difference between American and British English?
<bot>: The main differences between American and British English are pronunciation, spelling and vocabulary. In American English, the “r” sound at the end of words is usually pronounced, whereas in British English it is usually silent. American English uses different spellings for many words, such as “color” and “favor”, while British English spells them as “colour” and “favour”. And, of course, many words are used differently on either side of the Atlantic. For example, in America, the name of a flat tyre is “flat tire,” while in Britain it’s a “puncture.”