Making text about contacting FD more precise

Thanks to mapreri and hartmans for the wording

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

process/email.py

@@ -216,7 +216,10 @@ to undo the assignment.
 
 The nm.debian.org page for this process is at {url}
 
-I hope you have a good time, and if you need anything please mail nm@debian.org.
+If at any point either of you have any questions or concerns about the
+interaction you are having, don't hesitate to contact nm@debian.org.
+
+I hope you have a good time!
 
 {assignment.assigned_by.fullname} for Front Desk
 """