Describe your feature request
Convert some LangChain use case sample code to working Repls or templates.
Example source links:
https://python.langchain.com/en/latest/use_cases/personal_assistants.html
What problem(s) would this feature solve?
What all other useful Repls and templates do: allow a quicker start on working on our own code learning / using an excellent framework like LangChain.