3. The information providing apparatus for the vehicle claimed in claim 1 , further comprising: an interest determining keyword retrieving device for extracting an interest determining keyword, which is used for determining the user interest according to the conversation contents, wherein the base data accumulation device for determining the user interest includes an interest determining keyword storage device for accumulating the extracted interest determining keyword.
4. The information providing apparatus for the vehicle claimed in claim 3 , wherein the service information collecting device searches service information to be collected by using the interest determining keyword retrieved by the interest determining keyword retrieving device, and wherein the interest determining keyword retrieving device analyzes a frequency of occurrence of the interest determining keyword accumulated in the interest determining keyword storage device, and sets higher priority for employing the interest determining keyword having high occurrence frequency when the service information collecting device searches the service information.