I am giving one star just because I need to give a...

I am giving one star just because I need to give a rating else 0 stars would be my rating. It was not once but thrice I had this experience from yellow cabs. I generally call the yellow cabs either a day before or at least 12 hours in advance to reserve a cab. When I reserve the cab, everything goes well but when the time comes, no one turns up. When I call the yellow cab service, the response I get is that no driver in my area accepted the reservation. I was stunned with the response. Luckily in all these 3 scenarios, my friends came to my rescue. Since then I decided Yellow cabs contact would be deleted from my phone and would never call then again. I have seen some really good drivers in Yellow cab but as an taxi agency its not reliable. I would not recommend this to someone who gives value to their time.