"Let's enter first and make a quick search." tells River while paying the cab driver. "Here five gold pieces. And here another five, I would like you to go back where you pick up us first and look for a time for three of my friends. They should be together and easily identified: One half-orc with his and replaced with a mace, an heavily armed dwarf that look like a gladiator and fierce looking warrior with a two handed blade.
They might look mean, but they aren't dangerous unless you provoke them seriously. Bring them back here. Told them River is waiting them at 813, home of Shageon Gladdenstone. Once you are back, I might need your service again if you are willing to help. If you decide to not wait, I am grateful for your help up to now."
On that River walks to the 813 and knock at the door and wait a minute before trying to open the door.