say hi to ... for meUsed when asking someone to pass on your greetings to another person. ฝาก means to entrust or ask someone to do something on your behalf, and ทักทาย means to greet.
TH: ถ้าเจอคุณแม่ ฝากทักทายท่านด้วยนะ
EN: If you see your mother, please say hi to her for me.