If you have retained your lawyer, and your lawyer is unable to appear on your behalf due to a scheduling conflict, your lawyer should explain what you should do, and would ordinarily try to arrange to have the hearing adjourned or another lawyer help you out at the hearing. If you have not retained a lawyer yet, it may be helpful to consider hiring a lawyer who can meet with you in advance of your court date.

If you are intent on hiring this specific lawyer, contact his office, explain the situation, and see what they advise.