Assuming that:
1. You were calm and in control.
2. You were not under the influence of any mind-altering substances (because you will be investigated).
Then the correct reponse is "Officer, I was expressing a reasonable view using reasonable language. Under the circumstances I think YOU SHOULD CONSIDER the possibility that the only way the FA could have interpreted my comments in such a manner is if that person was under the influence of a mind-altering substance."