Greetings Professor.
Regrettably, I'm on travel in New York City today and can't make it to class  this evening.
I don't anticipate having to miss any other classes this  semester.
Regards,

E234
Greetings Professor.
Regrettably, I'm on travel in New York City today and can't make it to class this evening.
I don't anticipate having to miss any other classes this semester.
Regards,
classes semester regards regrettably travel new today make evening miss york anticipate having