ok...you finally make the call, but you can't (shouldn't) discuss services, or money, etc., so what do you say (or ask)? "Hi, I saw you add and love your pictures?", or "how would you like to meet me at Starbucks, or "This is Bob, and I just got into town..." Help!
An email or completed prescreening form in advance of your trip so they have time to verify you. They also prefer a firm appt request, again in advance).
Calling and saying "hey I am in town, want to meet at Starbucks" probably won't get you very far.
If you call a lady last minute with no prescreening, the chances are you won't get seen.
Read the self-help manual on this page (near the moderator info) and look at the Provider Relations 101 section. You should find your answers there!
"Hi my name is heinous (I use my real name - just first for now) and I saw your ad on (wherever it was) and was wondering if I could make arrangements to get together with you." Typically she'll ask me at that point what I was thinking in terms of dates/times.
You should have researched beforehand to make sure you're comfortable with the donation and if the lady is visiting, in which case you've got a fixed window of days you can see her. You should have an idea of when (day and times) you'd like to get together before you call.
She'll probably take over at this point and request screening info, but I think it's polite to offer and ask what info she needs from you to make an appointment.
I'm sure other guys do it differently but this has worked for me. If you're a newbie and nervous it helps to disclose this as well.
Good luck!
heinous
Most of us girls have a website that should answer this for you. Be sure to read her site thoroughly before contacting her. Be aware of her screening process/donations/availability(if she has this on her site)/and Most girls appreciate knowing where you found her, eccie, p411, etc 
happy hobbying
I know most guys get nervous, especially if they are newbies. Just take a deep breath, relax, introduce yourself, "Hi, my name is Bob. I saw your ad on .... I would like to schedule an appt for..." Anything similar to this is fine. By the time you make the call you should have done your research and know what services she offers, her rates and hours of availability. All of this info should be on her website.
Just relax, we know you may be nervous, just remember not to ask about specific services, be respectful, and be prepared to answer any screening questions she may require. If you have introduced yourself properly and sound like a gentleman we will take the conversation from there.
I might send an initial email that looks something like this:
Hi (Name Here)
My name is Hungry, and I'll be visiting your area in a couple of weeks. I saw your ad on (Date-Check, P411, TER, etc.) and would love to share an evening with you. I was hoping you would be available for a dinner date on Saturday, July 2nd. I am a member of (sites here) and can provide additional references, if you need them. Please let me know if you are available. I'll be looking forward to hearing from you.
Thank you
Hungry
If the lady responds, then I will provide whatever information she requires.
you would not BELIEVE all the crazy types of emails we get. lol Doing your homework before you make your request? What a concept! You will be miles ahead of the rest.
Good for you.
Angie 
XXOO
P.S. Someday it would be fun to make a thread of all the wild, crazy, strange, and sometimes creepy, email requests we providers receive. Then you guys can see what we have to put up with on a day to day basis, lol! You will honestly not believe it. And just when we think we have "heard it all," another request comes in that tops the one before it. lol
There was a provider on here years ago who had a gread collection of clips from e-mails. Some were funny, some were weird, and some were seriously scary. She'd cut out "interesting" parts minus any identifying data and send them to some of us. She swore they were all from real e-mails she'd received but some were hard to believe.
I agree with the general opinion...do your homework before you call. The donation section of a website is generally the second page you look at right after the pictures. NEVER ask "how much?" or anything along those lines, or ask explicit questions. It's a surefire way to get hung up on. Most providers, myself included, are outgoing and friendly, and will go out of their way to put you at ease. Generally if a phone call is the initial contact, I will request that a gentleman email me his screening information and offer to return his call once screening is completed at a time convenient for him, or set the appointment entirely through email. Good luck! And don't worry about being nervous, most of the ladies I know find it pretty endearing, actually.
Never ask a provider anything you wouldn't ask a civvie before your first date by phone, email ,or in person.. Read the reviews so you know whats offered and go for it respectfully, without asking if you can. If you walk in and start kissing, and ask her if there is a upcharge for sex, play time is over.
