Add punctuation: Priority baggage delivery is not available on flights operated by British Airways
A: Priority baggage delivery is not available on flights operated by British Airways.

Add punctuation: At that time it did not receive a particularly enthusiastic reception as it did not have any digitally sampled sounds wihich was demanded by musicians at the time
A: At that time, it did not receive a particularly enthusiastic reception, as it did not have any digitally sampled sounds, wihich was demanded by musicians at the time.

Add punctuation: We experienced some formidable sunsets
A:
We experienced some formidable sunsets.