When we're travelling for ourselves, we don't often think to make a note of the conversations we have, though professional travel journalists and authors will often take a notebook and note conversations, times, dates and places.
For the latest prompt, try to write up what you remember of an interaction with a local, or a fellow traveller, from any past adventure you've been on. Where were you: haggling in a market? Meeting at a restaurant? What do you remember them saying, exactly? Can you only remember the outline of what they said? If so, jot it down.
What was it about? How did they describe things? Did you learn something from the conversation, and if so, how would get that across subtly in your writing, without saying it outright? Imagine how you'd recall the conversation to a friend or colleague, and try to write it that way.
Write as much or as little as you like. Keep your writing somewhere safe, so you can refer back to it.