Aman claps his hands and his servants bring in a large assortment of food and beverages. You get the impression that this man is certainly well off and, judging by the number of books in his study, he's also a well educated man.
He goes on to explain that he needs you to go out into the desert and find the lost tomb of Martek. He explains that based on his studies there is some kind of sphere of power that's about to break free of its bonds and that somebody needs to find it and destroy it if it does. It was this sphere that caused the river that used to run through the desert to completely dry up.
He also calls in an elf and introduces him as Jherek. He was hired by Aman to find this tomb should your group not arrive in time. But, now that you're here, he will accompany your party and lend aid where he can.
Hafer, hearing the plea for help, will offer his services to the party as well. He explains that he is skilled in the arcane arts and should be able to help as well.
Aman, also explains that your are currently in the town of Bralizzar (See map). It's a caravan staging area for any merchants who are willing to make the journey across the desert.
To find the tomb, you will have to pass through Northknife pass, which is dangerous enough (That's why it's important for merchants to go in large numbers to cross it). Once on the other side you will enter the desert and there you can begin your search.
Aman gives you some rough directions to locations where he thinks the tomb may be located but can offer no guarantees.
After this long discourse, he sits back to see if you have any questions.