I recently had two very good interviews over the phone with a hiring manager. Both interviews were pretty technical and I suspected that round 3, the on-site interview, would be more of a formality/behavioral/team-fit type of interview, just to see whether we'll all get along together.
However, I impulsively canceled this round 3 interview, on the day of the interview, telling the human resources lady (not the hiring manager who interviewed me over the phone) on email that I am planning to stay longer at my current job because things are in an exciting stage here.
Now I regret it and wish to be reconsidered. What could I do to ask for reconsideration? Should I apologize too? I feel at this point there's nothing to lose from asking them and expressing interest again.
For clarity: I don't have the email or phone number of the hiring manager that conducted the phone interviews; the human resources lady set up my appointments and confirmed the interview details with me.
Note: yesterday was the scheduled on-site interview.
Update: I wrote an email to the HR lady and apologized for the inconvenience that I may have caused them and I expressed interest again and asked whether they could reconsider me. I told her honestly that in the moment that I canceled my interview I had felt somewhat attached to my current place of work, but that I do have plans to leave soon.
The lady emailed me back later in the day to give me the phone number of someone in charge of these decisions, and she said that he'll decide how to move forward. I couldn't reach him on Friday afternoon so I intend to try him on Monday morning. Thanks everyone for your answers and comments :)