Please keep in mind that how things work in your locality may not be the case for the OP's. Things can even vary from court to court.
stated, "where I live". Others here said they got it postponed due to a vacation. I had a dr. appt scheduled that I had waited months for, and they postponed without a problem. I did call right when I got the summonds though, not close to the time of service. I don't think I even had to talk to someone. It was automated.
Also here there are very few exceptions. Young children, owning a business, etc. won't get you out of it.