Dear Ms Thuy,
We enjoyed the tour of Vietnam very much. The only day that could have been better was day 7 when all we did was fly from Danang to HCM City. I don't know if there is any flexibility in the airline schedules, but it would have been better to fly either early in the morning or late in the afternoon and have another day in Hoi An or HCM City, rather than flying in the middle of the day. As you requested, attached are a couple of pictures.
Thanks for all you help.
Harold Nelson