Lord Exr and Khan would have happily feasted until night, but duties arrived before they had the time to enjoy the friendly phase of the meeting.
The four ships with the rescued soldiers and workers needed directives Amox couldn't give on his own. The vehicles had medical teams, but they weren't enough to tend to the injured. Proper medical bays were necessary, and only Lord Exr had the authority to prepare similar places.
As for Khan, his position in Lord Exr's ship prevented him from directly supporting his team. Still, he could fulfill his leadership's duties by deciding the details for the rest of the operation with Lord Exr. That was enough for his role.
Lord Exr had to handle matters that involved classified locations and information to prepare the medical bays, and keeping Khan locked in the ship wasn't proper. So, he dropped him in front of the political building before departing to complete the rest of his duties.