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Dear Madam,

I have committed on 30th October 2012 with my Doctor for my Medcal Check-up.
So I would like to inform you that I want three days leave from 29th to 31st October 2012.

Thank you very much for cosideration.
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Dear Madam,

I have an appointment on October 30th with my doctor for my medical check-up. So I would like to ask you for three days leave from October 29th to 31st.

Thank you very much for consideration.