Write the next sentence in the following story.

How to talk to a girl over the phone
Have a reason to call.
Before you pick up the phone, make sure you know why you're calling. If you're phoning a girl you already know, it may be to ask her out.
If it's a girl who you're hoping to get to know better, it may be to follow up on a conversation that you've already had. It's important to have a concrete reason so you don't just wind up rambling.