Given the input text
RANDOMNUMBERS Can I have some milk please
or
RANDOMNUMBERS Can I have some milk

I need to match both strings and capture only the Can I have some milk part omitting the please if it exists and putting the content in the SAME capture group whether or not the please is present.

Assuming [RANDOMNUMBERS] can I have will always be there, anything else can come afterwards. [RANDOMNUMBERS] and please should be omitted from the capture group if it’s there.

e.g. RANDOMNUMBERS Can I have more toast please and RANDOMNUMBERS Can I have more toast
should yield Can I have more toast for both as the SAME capture group number

the closest I’ve come to solving this is with
(?(?=(?!.*please).*Can I have).*(Can I have.*)|.*(Can I have.*)( please))

The above does capture the string that I want Can I have more toast whether or not the please exists however the captured phrase is put in different group numbers i.e group 1 when please is omitted and group 2 when please is present.