[Djinnandtonic]

Right, it is good advice not to mislead customers... however, how am I ever going to learn if I don't start with even the most common phrases?

And yeah, I thought "Irasshaimase" might not be the appropriate phrase to use on a flight... but what phrase -would- be good?

Perhaps some more specific phrases would make the question more direct? Like...
"The boarding gate for this flight to Tokyo has changed, we are now assigned to gate 2"
"Would you like a drink with dinner? Would you like ice in your drink?"
"The captain has announced that we have lost hydraulics and will be making and emergency landing. Please review the location and operation of the emergency exits".