Thank you all for your interesting inputs.

My booking I am referring to is pure DL metal, no codeshares and no other airlines involved. The booking was set up by DL central reservations in the UK or Ireland and also ticketed by DL itself.

The reason I am keen to pull it up on a website different from DL's own is that so I could allow my friends to look into my booking without disclosing my Skymiles PIN (and neither they would play with my seat assignments).

Sorry for not being more explanatory first.

Thanks again.