Cute things to text a girl you like?

I've been texting this girl and for the past 4 days she's texted me goodmorning and we text eachother and than we call eachother. Next monday well be going to the movies and either dinner/ice cream or oth idk...its all good to me. I want to send her something either cute or funny but not sure what exactly to send. Or should I just say hey and spark convos that way. Also, what are some good convos to start with and keeping goin' with a girl? Basically as well as cute or funny things to text her i want to know how to keep a convo going with a girl you like. I'm not an ameauture lol, but I just want other peoples advice...Thanks1