US01: "Hello world!"

[takouhai]

As a user that’s interacting with the bot for the first time, I wish to introduce myself to the bot to get to know its features, let it know who I am and what my accounts on all of the company’s integrations are.

Acceptance criteria

• When I message the bot for the first time in my Slack team, I should be able to see a general summary of the bot’s key features in plain, simple English.
• When I message the bot, I should receive messages with my first name or a nickname that I’ve given it.
• When I message the bot for the first time in my Slack team, I should be offered to start setting up the user identification information needed for Trello, Hubstaff, etc.

Design

User: [greeting or help message]
Bot [PM]: Hey, there! Here are a few things I can do for you that I think are pretty neat. :wink:
* Sample
* Commands
* Go
* Here
// Separate message, only if user is new.
Bot [PM]: Oh, hey, do you have a minute? I need some info on who you are on Trello, Hubstaff and some other places. Is that alright?