Dear Mary,
I am very much looking forward to your visit to my city. Just think: after all these years of writing to each other, we will finally have the chance to meet! However, I regret to inform you that I will not be able to meet you at the airport as soon as you arrive.
The reason is that your flight will arrive early in the morning, and the quickest I can get to the airport will be about an hour after you land. Please wait for me in the arrival lounge. You should be able to have breakfast there while you wait.
By the way, as we have never met I must tell you how to recognize me: I am medium height and have a small mustache. In addition, I will be carrying a copy of the morning newspaper tucked under my left arm.
Looking forward to out first meeting.
Yours sincerely,
Harry