In all of Risa's quests where it requires her to be your Party member, it will say "With Lisa as your only partner,..." In the Client Message portion of the Client Order Details.
Please change Lisa to Risa. This was due to translation error as Japanese "Ri" sounds like English "Li".
Some of the of quests with this issue: How's Your Gunblade Handling? How's Your Rifle Handling? How's Your Launcher Handling? Time for a Trip to the Volcanic Caves Luxuriating at the Seabed Luxuriating at the Dragon Altar
(There are more quests like this, these are just a few).