Can you apply your knowledge of contract law principles in analyzing and interpreting this issue relating to contract law?

Situation

Extreme Skiing Company, a company that specializes in ski trips, offers a heli-skiing trip that involves a helicopter ride to a remote mountain slope. The price of $1,000 per person, which includes hotel, meals, and helicopter transportation, is advertised in a skiing magazine. In response to the advertisement, Allyson calls Extreme Skiing and agrees over the telephone that she and Matthias will join the trip. Extreme Skiing's representative says he will mail the enrollment forms to Allyson and Matthias. Allyson agrees that she and Matthias will meet the trip operators at the hotel the day before the trip. Two weeks before the trip date, Allyson and Matthias receive and complete the enrollment forms. They mail the forms back to Extreme Skiing along with the payment price. These are received by the company one week before the trip.