This makes us sad...
Perhaps:
Dear Neighbour: Not all #essentialworkers wear uniforms. If you are one of those, thank you for your service.
PS: this note has been disinfected for your safety. #WereInThisTogether https://twitter.com/Bob0Mar/status/1248242433923502080

Dear Neighbour
I see you travel everyday in your car. Self isolation can be really lonely, and if you have anxiety can feel claustrophobic. If you need to phone a friend...heres my number. #WereInThisTogether

Dear Neighbour, I have been watching you travel everyday in your car. I wonder if home is a safe place for you to be. If it isn't, here's a list of places you can call for help. #YouAreNotAlone #WereInThisTogether
Sincerely, a caring neighbour

Dear Neighbour, I have been watching you travel everyday in your car. I wonder if you are one of the thousands volunteering to help others in need at this terrible time. If you are, Thank you and #StaySafe #WereInThisTogether
From your neighbour

Dear Neighbour,
I have been watching you travel everyday in your car. I feel like I know you already. When all this over I look forward to meeting you in person! #communityspirit #WereInThisTogether

Dear all of you...if you have a Dear Neigbour note you'd like to add to this thread...pls DO! Let's combat the fear together and #spreadthelove to our community...locally, nationally, internationally...Globally!
#WereInThisTogether
#BeTheChange
#communitymatters