“Hey beautiful” may work for some girls but it makes me cringe and doesn’t further the conversation. Ditto for pickup lines, anything sexual or anything too presumptuous even jokingly like “I hope our kids get your red hair”. It’s a first impression, so I’d air on the side of inoffensive and even dull. Something you think is a compliment or joke with even the best of intentions might get you dinged because the person on the other end doesn’t get it or see it that way