Believe it or not, those are the roles that get some of the most guest interaction, the most difficult, and truly require you to be hospitable.
Your chances at changing her role are slim to none. Prospective students make selections at preferred roles, and the Company places them based on their interview, role preference, prior education, and most importantly, the Company's operational needs. You are more than welcome to call and request a change, don't know who you would contact for that though. There should be contact information for the Casting Office in the information packets she's received.
Honestly though, every role that is available in the CP is a hospitality role, it just depends on what your definition is of Hospitality. Her role is technically "Recreation," she could be placed as a lifeguard at one of the resorts, or at one of the waterparks. The skills she can gain during this role can be applied in a number of ways, it all depends on how she markets herself. In Recreation, she will be responsible for the safety and lives of her guests, must anticipate potential safety risks, and partner with other departments in the parks or resorts during guest situations among other things.
I think the most extreme you can get with hospitality and guest service is perfoming CPR to save the life of a guest.