One possible version:
A)Dear Pat,
A)Dear Pat,
We have decided to take a trip to Windsor on Sunday(18th). We’ll meet outside the school main doors at 9:00 a.m.,and our coach leaves at 9:15. Don’t be late!Anyone going on the trip needs to pay 5 pounds. In Windsor we’ll have a pleasant trip around a famous castle, but it will cost you an extra 3 pounds. Don’t forget to have on comfortable shoes because we’ll have lots of walking there. You’d better take a raincoat with you, in case it rains.We will return from Windsor at 6:00 p.m.I expect it will be a very exciting trip.
See you soon!
Jack
B)Dear Sir,
Pat has to go away for a couple of days and he will be back late on Saturday evening. Also, he would like to go on the school trip to Windsor on Sunday and he asked me to deliver this message to you.
Thank you very much. See you.
Jack