<prompt> Human: Note: the 1000 will be paid off on time and interest free.I already have an American Express CC and I was looking at getting the United Airlines card to take advantage of the free 30,000 miles for signing up. After spending 1000 in the first three months, I wouldnt use it again and I would cancel it before the renewal. What affect will this have on my credit?  <response>: rchurning 