Here are some phrases you can use to greet someone in Engpsh during the New Year:
"Happy New Year!"
"Wishing you a happy and prosperous New Year!"
"I hope the New Year brings you joy and success!"
"Wishing you a healthy and successful New Year!"
"May the New Year be full of blessings and joy for you and your loved ones!"
Remember to also use body language and facial expressions to show enthusiasm and friendpness. You can also add other elements such as hugging, shaking hands, or waving to add a personal touch to your greeting.