Yet another tipping question

[Gandor]

My fiancee was just flown down to a job interview in Florida. The company is picking up all expenses and she said they were sending a "limo" to pick her up at the airport. I'm suspecting this is more like a town car, but I don't know for sure. She has asked me how much, if anything, she should tip the driver.

My gut reaction is nothing since the expenses is being picked up by the company she is interviewing with. What is your opinion?

Thanks,