Here we have a sample letter to help you clarify the job profile offered to you before you can actually accept the job.

Name
Street Address
City, State, Zip

Ms. Vera Argo
Recruitment Coordinator
Cargill, Inc.
Cedar Rapids, IA 52513

Dear Ms. Argo:

Thank you for the prompt telephone call concerning the status of my candidacy. I am very pleased to receive an employment offer for the Quality Assurance Chemist position beginning at the end of May 20XX.
Before making a decision regarding this opportunity, I would like to receive additional information about the position as well as the orientation program for the laboratory science personnel.

I am very pleased to have been given an opportunity to begin my professional career with Cargill, Inc. As you requested, I will make my decision before May X, 20XX.
I look forward to speaking with you in the near future.