I replied to your other post re bank statement. I provided a screen shot from my NAB phone app just showing the balance. No transactions etc and it was my savings account not everyday account
You can put flight numbers in as they're usually the same flight numbers for the same carrier on each path. So for instance I put SQxx for my one way flight from Cairns> Singapore> Bangkok
With regard to the bank account, I provided a screenshot from my bank app from my phone on the day of applying. It only showed the amount, not 3 months worth etc. I could have provided this info however I saw a post on here stating only the screen shot was required.