1) "Can you fasten your seatbelts, please?"
The flight attendant told/asked us
2)"Don't worry, Sam. Andrew is going to come soon."
She told/asked Sam because Andrew was going to come soon.
3) "Can you slow down, please?"
He asked/told his friend
4) "Please don't tell my parents."
My friend told/asked me his parents
1) asked... to fasten our seatbelts
2) told... not to worry
3) asked... to slow down
4) asked... not to tell