question: you can access your booking online now. all you need is your email address and booking reference. retrieve your reservation
Capitalize this past sentence correctly.
A: You can access your booking online now. All you need is your email address and booking reference. Retrieve your reservation

question: if they disagree on style and form, however, it is fine for them to remain separate.
Capitalize this past sentence correctly.
A: If they disagree on style and form, however, it is fine for them to remain separate.

question: dust bag: bag with a capacity of 3 liters
Capitalize this past sentence correctly.
A: Dust bag: bag with a capacity of 3 liters