Bob. Solution for Power Query M language

Bob.pq

(message as text) as text => 
  let 
    yelling = Text.Upper(phrase) = phrase and Text.Lower(phrase) <> phrase,
    question = Text.EndsWith(phrase, "?"),
    phrase = Text.Trim(message)
  in if phrase = "" then 
    "Fine. Be that way!"
  else if yelling and question then 
    "Calm down, I know what I'm doing!"
  else if yelling then
    "Whoa, chill out!"
  else if question then
    "Sure."
  else
    "Whatever."