Joolspolo
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work You must attend this second appointment or your file will be returned to the DWP and it is likely that your claim will be closed.
Is there really no one who can go with you?
The only thing that I can suggest is that you ask to have the assessment recorded, this usually requires the existing appointment to be re-booked at no fault to the claimant, there is a template letter in the ESA Claim guides you can use.
www.benefitsandwork.co.uk/help-for-claimants/esa1 Hopefully, a new appointment will be for when your daughter is available.
Gordon