Rephrasing

Could you please check out this rephrasing exercise?

Wording:
a) You should not use sleeping tablets during a long haul flight. Sleeping tablets (…)
b) I did not wear an eye mask. I could not sleep during the flight. If I (…)
c) “Drink caffeinated drinks in moderation during the day”, the doctor said to me. The doctor advised(…)
d) The dry air aboard your aircraft can give you headaches and dry your skin. For this reason, you should drink water regularly. Since (…)

a) Sleeping tablets shouldn’t be used during a long haul flight.
b) If I had worn an eye mask I could have slept during the flight.
c) The doctor advised me to drink caffeinated drinks in moderation during the day.
d) Since dry air aboard your aircraft can give you headaches and dry your skin, you should drink water regularly.