@Eric6011
Useally i first ask for more information and when answer does not suit me, i decline the request. Now you declined first and then asked for more information. Which can be intrepreted by the guest as " I provided you with what you wanted and now i can book again".
So you try to ask the guest to retract the booking request if you consider the guest and family not as a good fit. Otherwise decline again and make clear to the guest not to book again.