I made a reservation about 3 months ago for a stay next week. I neglected to ask for a platinum upgrade in the comments section when I originally made the reservation. I cannot find the comments section when I go to edit my reservation (but I do see it if I make a new reservation- with a rate 30% higher than my current rate). Do any experts know if it is possible to enter comments after the reservation is made? Thank you in advance for your help.