Responder's assignment may refer to two paper notes in Fallout 76. One is found during random encounter, while the other was cut.
Location[]
The note can be found on a Responder corpse during the Dead Responder random encounter. It will start a miscellaneous quest to investigate a variable location.
Transcripts[]
Note 1[]
Responder,
Word is there are civvies at <Alias=Dungeon> that could use our assistance. Please make your way there and see what good we can do for them.
Cut[]
There are reports of a survivor group holed up near <Alias=Dungeon> who are running low on supplies. I know our rations are limited but bring them these provisions and teach them what you can.