I will ask the reason for why he didn't attend the rehearsals. then i would say my group to be patient.if he gives the correct reason then its okay.otherwise , i would give my advice as follows:
* please avoid bunking the rehearsals.
*you a group member of our dance.if you don't perform well our whole dance group will get a bad remark.
AT LAST ....
*please say if you are not interested.