A phone talk. P.S. Please correct my mistakes, I'd appreciate it.

A phone rings.

Zoey: Hello? Hello?
Anonim: [silence] 
Zoey: If you like silence, you can have it.

Zoey angrily puts the phone down, but it rings again.

Zoey: Who the hell is it?
Sherry: Umm, it's Sherry. Is something wrong? 
Zoey: Oh, it's you. Sorry - it's just that these idiots keep calling me and then not saying anything! I don't know what to do.
Sherry: I wouldn't worry about it - it's probably just kids. Can I give you a piece of advice?
Zoey: Of course, if it helps.
Sherry: When you answer your phone don't say anything. Just be quiet and wait for them to hang up. It'll help you.
Zoey: Well... I'll try it, but I doubt that's the most effective solution.
Sherry: Give it a try. Actually, I called to ask if you want to go shopping with me? You know I can't go alone because I'll buy useful (?) stuff.
Zoey: If I could, I would go with you, but I'm on a deadline at work and will be stuck here all night.
Sherry: Too bad! Maybe next time.
Zoey: Yeah, sorry.
Sherry: Maybe next time. See you this weekend, ok?
Zoey: Yeah, sure. Bye. 
Sherry: Ta-ta

(I changed a bunch of things in your text, but it's not exactly like anything was exactly wrong. If this was for a grade in school, for example, you'd do fine with this. It's all understandable enough. However, if your goal is to write 'natural' sounding English, this is how I as an (American) English speaker would expect the same conversation to flow.)