The walkman you bought a month before is broken down. Write to the manufacturer's service department. The letter should include:
　　（1） the problem of the walkman
　　（2） ask for warranty
　　（3） remind them of the enclosure
　　You should write about 100 words. Do not sign your own name at the end of the letter. Use “John Smith” instead. You do not need to write the address.