my hair falls flat after curling, any tips?

Katie

so i have pretty straight hair usually and whenever i curl my hair it goes flat within minutes... does anyone have any tips to help keep my hair curled longer?

this is my hair normally (i don’t have a good picture of it)..

and this is when my hairstylist curled it.. it fell out in five minutes and was straight again

please comment any tips you may have!! 🤙🏼