Hello Helen,
Traditionally - the large Tour Operators have their own representative at the airport who ensures that all passengers are allocated to the correct coach going to the resort. However, this may be a local representative who may not accompany you on the coach to your hotel.
There may not be an "official welcome meeting", but you will always find a notice board located near, or in, the reception area where there will either be a notice or a folder belonging to First Choice on which will be the name of your representative and the times he/she will be visiting your hotel. There should also be a telephone number just in case you need to contact him/her outside of their visiting times.
If you need more info - you could contact their administration department on 0871 664 0136 [this should go direct through to them]
Have a lovely time at the Papagayo Arena Resort - we have always had good reports about it.
Kind regards
Gail