I would like to inform you that I will not be available in the [Morning/Afternoon]/[From hour to hour] of [Date]. I would like to notify you that it so appears that my father is traveling to see me, and I must receive him at the airport. There is no one else in town to pick him up. I ensure that my tasks for the day will be finished by then. I would be available by phone if there is any urgency. Thank you for accepting my request.