This answer is suggesting that you are actively interviewing. Mentioning a second interview with another company also shows that you passed the first interview stage. You are not admitting to any fault by not receiving any offers, but simply saying it is too early because you haven't been searching for a job that long.
If you have been looking for a job for a long time, then you will not be able to use an answer like I just showed. Instead, you might have to be honest and try to put the blame somewhere else. More likely you will not receive this answer, but just in case, here is one more example. This example admits directly to not receiving any offers but shows diligence and shows that this person doesn't give up.