In the following sentence, is it better to use or omit the word 'that'?
They called and told me (that?) I will need to take a helicopter.
After reading Can we say "He is a friend of mine I love" instead of "He is a friend of mine who/that I love"?, I see that it is technically required in very formal writing, but not required for general conversation.
What about in common business writing, or on StackExchange, such in the previous sentence?