What do I do?

[DisneyDoll]

I had a weird thing happen to me that I wanted advice on. I am going through recruitment and recently met the girls from one sorority at my new school. I met them through someone who is a member of that sorority (but not that chapter). Since then, they call me all the time and invite me to hang out with them. They never bring up recruitment or their sorority but they do know that I want to rush. I really like them as friends and they are always nice. Yesterday, I got an email from one of the girls from this group. She asked me to do her a big favor by dropping her off at the airport. She can't find another ride. She then wrote that she hopes I can do this for her because she would hate to have anything bad to say about me when I go through recruitment and her chapter. What do I do now? I have no problem taking her to the airport tomorrow but do I let the other girls know? Let it go? I am worried she may bad talk me to her friends outside of her chapter and in other ones and ruin my chances of joining.