We had luck with actual sound capture in this sense. The sound of the footage works just fine with 30 seconds of animation. Firstly there was a classical music on the Trafalgar square where we met and we decided to include that. Then the music slowly dissolves in everyday busy street sounds on the back of our chatting behind the table. As we exaggerated the footage, our chatting started to sound like insects complaining...it sounds so funny that we probably wont need to import any sounds from sound library, just do a bit more of adjustments of the original soundtrack of the footage with the final compositing.
THE TRACK YOU TUBE.