Student or Learner
First of all, I would like to express my sincere appreciation to the Principal of St Joseph School, for coming to our school to grace the occasion despite her/your extremely busy schedule.
I think it should be 'her', but my friend thinks that it should be 'your'. The principal was present on the occasion. Her argument is that she was there, therefore we should use 'your', but I think that it should 'her' because the speaker is addressing the audience.
Who is correct. she or me?