Right then Danny, I'll assume you're not a piss taking one poster and offer up my ways.
If her name is on the profile then address her by it, if it's not then you can only call her by her aw name, along the lines of "hello, is that spunk gobbler"
Just state what day and time you're looking for, along the lines of "hello spunk gobbler, I'm interested in meeting you on so and so day and time"
Same with the likes, ask her about them, she'll have been asked many times before.
Don't be a shy cock on the phone or a fuckin weirdo, be right and talk normally, you're not meeting a martian.
Turn up clean, fresh with a good attitude and you'll have a blast.
If you're nervous I'd go for an hour as it gives you time to calm down and relax without the pressure of watching the clock, experienced lads go for 30 minutes but know exactly what they want and how to behave, don't over think it, you're there to enjoy yourself but it's not like buying a new tv from argos.
You'll get a much better time if she relaxes in your company, be friendly and happy and you'll get what you're looking for, be a fuckin weirdo and you'll get the minimum to get you back out if the door.
I'll assume you're genuine, if you're not then you'll get seen through on here
Pick a well reviewed lass