Via OD. Both with Outlook addresses, both with similar wording on their enquiries and both enquiring in a vague way about availability for months that are showing as fully booked on my calendar (June and July).
Message text:
"I am travelling with my 4 member family. What weeks do you have available in June? Looking forward to hearing from you!"
"Hello, I am looking for a week in June or July for me and my other 3 members family. Looking forward to an awesome vacation. Regards!"