Verizon phone not sending texts and calls?

It's pretty much what I said. I have an LG Voyager from Verizon, and this happened last week as well. But, my phone is not sending my text messages it just displays the sending message screen until I cancel the message. Also, I can't place calls. I tried calling my dad, and it doesn't even ring it just says "calling dad" but doesn't ring.. I have service, it's not because of that because it happens where ever I happen to be when it acts up. Is there a reason behind this?