你是Lucy,写一封给老同学Allen的邀请信,邀请他参加下个星期日下午4点（12月23日）的校友聚会。希望Allen尽快回信接受邀请，以便他们及时做好安排。
December 16,2012
Dear Allen,
We are having all classmates for dinner at 4 p. m. next Sunday（December 23） at the hotel. There will be a big reunion. Would it be possible for you to join in it at your convenience? I hope that you will feel it worthwhile to accept this invitation. We haven’t seen each other for a long time and we are all anxious to have you with us.
We shall be very much pleased if we receive word of your acceptance in the near future, so that we can make good arrangements in time.
Yours,
Lucy
