You may pay the airfare from your personal credit card and get reimbursed later; save the receipts (and at least one boarding pass) and send them to Natasha after the trip is complete. If you want to use a departmental card, contact Natasha and follow the rules described in the Pcard section below.
To have the university prepay your travel, contact one of OSU's designated travel agencies
or send your request to Natasha (preferred) with the exact flights you would like booked. You will need to provide the following information: Name on id, cell phone number, and date of birth. Once you have received a quote for the flight you prefer, if you have contacted the travel agency yourself, forward it on to Natasha so that a travel request can be created and the funds can be released to the travel agency for payment.