One thing that helps me with "Keeping a convo flowing" is mix up statements and questions when you are talking. It will keep her interacting and keep YOU interesting. Alot of guys will tend to think they have to stack routine after routine, when PEOPLE really don't give a fuck what topic you are talking about or if it was at all related to the last topic as long as they are entertained.
Watch Curb Your Enthusiasm. Larry David is the king of random conversation. Girls like random. Because you are not being LOGICAL like every other dude that talks to her. Whirlwind relationship stories are personally my favorite cause they will always gives me something interesting to fall back, on that she can relate with me to where I won't sound like an idiot going back into the conversation.
Example of what I am talking about...
Me: "If you could live in any country in the world... where would it be?"
Her: "I don't know.. Jamaica."
Me: "OMG I've always wanted to go there/went there last year/last week/whatever!
Her: OMG blah blah blah blah blah
Me: Do you know what I would do with you? Let's steal a leer jet, fly to Jamaica, heist a mansion that is miles and miles away from anyone, and lay around all day naked, playing video games, eating Cheetos! You seem like a shitty co-pilot though

Her: **she qualifies herself, saying why she would make a good co-pilot**
Me: *let my imagination run and see what random bullshit comes out, keep emotions positve, and now all the sudden she is thinking about playing video games naked in some mansion with me in Jamaica and it doesn't really matter what I am saying anymore. Be playful and fun."
So many guys will try and start dirty talking a girl while they are in a bar or club, and if you really want high value women, THAT DOESN'T WORK. They don't like feeling like sluts. If you can simply keep the emotions positive in what you are saying, escalate kino with out breaking her comfort levels and with out going into seduction mode in a public place and creeping her out. Just keep it light and playful and quit worrying about impressing her so much. SHE SHOULD BE TRYING TO IMPRESS YOUUUUU!