Hello, my name is Liam. I am interested in a 1hr booking for GFE this upcoming Tuesday around lunchtime. Please let me know if that works for your schedule.
This is a good polite template - most escorts prefer if you suggest specific time and duration in your first message. Personally, I tend to begin with a compliment on their profile (assuming a first meeting).
Help Keyla fund her battle with cancer - give what you can spare.