(As far as we know we have had no previous contact with the teacher and she does not name the school.)
I am currently putting together activities for a School Book Week next March.
Do you have any dates free during the weeks beginning 4th or 11th March when you could visit us in (name of town)?
Look forward to hearing from you.
( No previous contact with teacher or school but we had been contacted by Kate, a School Library Service Librarian. This correspondent gave her name, position and the name of school)