Just log into your account, check availability, select desired flights, and when you go to book or hold the tickets, there will be a space to enter the passenger's name. This does not need to match the name on the account.

70,000 round trip or 35,000 miles one way is a good price (the cheapest level in miles). Avoid Delta for this as they charge the same for one way (70,000 miles for one way or round trip).

Placing a hold on the tickets first is a great idea.