I've found with emails to schedulers that I have to be very straightforward and provide them with a succinct list of what I need, almost in bullet point form. So, instead of:
@ wrote:
I'm interested in job XYZ, but can't complete it on the dates listed. Would it be possible to do it on Jan 1st instead? If so, I'd be interested in learning more about the job if you are able to send me the guidelines or additional information. Thank you!
I will now send this:
@ wrote:
I'm interested in learning more about job XYZ, can you please send me a copy of the guidelines or additional information about the job?
Please do not assign the job to me at this time. Thank you!
The second version has less information, and seems more brusque to me. But I've found that no matter how clear I try to be, if there's a date in the email I send to the scheduler, they will sometimes assign it to me. I understand that they get a lot of emails and if I were skimming through a note from a shopper quickly, I might just seize on the date too and assume they wanted to be assigned for that date, especially if I needed to get the job assigned.
Shopper in California's Bay Area