<human>: Give me the gist of the text in a nutshell

So in a few weeks I get to fly to my hometown with my daughter to visit my family for a week. She's 6 months old and almost always really well behaved and quiet. I'm mostly confident about the flight, but just in case things go bad, I wanted to ask all you wonderful parents for your advice.
What things should I bring in the carryon (which is her largest diaper bag)? What should I do if she screams and is completely inconsolable? What do I say if someone complains about a baby? I know that probably won't happen but I'm paranoid and I like to be well prepared.
I only bought my ticket so she'll be on my lap the whole fight (which is about 2 hours long). 

I have heard to let her nurse or suck on a pacifier during take off and landing, and I know the airline will check her car seat and stroller at the gate for free. Besides all that, what advice can you give?
Also, feel free to share your experiences as well.
<bot>: I'm taking my 6 month old daughter on a 2 hour flight for the first time and I need all the advice you can give.