Rasa how to get a value (slot) from a user - rasa-nlu

Question

I want rasa to respond to a user when they ask for a forecast for a part number.
From what I have read, I understand I need to use a slot, but I can't find a clear example that I can understand on how to get the part number from the user.
It would give me a head start if I could see an example nlu, story and domain where
the user is asked for a part number
The user enters the part number
Rasa responds with the part number.
here is what I have so far.
domain.yml
intents:
- greet
- goodbye
- affirm
- deny
- mood_great
- mood_unhappy
- bot_challenge
- get_supplier_forecast
entities:
- partnumber
slots:
partnumber:
type: text
templates:
utter_greet:
- text: Hey! How are you?
utter_cheer_up:
- text: 'Here is something to cheer you up:'
image: https://i.imgur.com/nGF1K8f.jpg
utter_did_that_help:
- text: Did that help you?
utter_happy:
- text: Great, carry on!
utter_goodbye:
- text: Bye
utter_iamabot:
- text: I am a bot, powered by Rasa.
utter_get_part_number:
- text: can you give me the part number please
utter_give_me_a_minute_while_i_check:
- text: Give me a minute while I see if I can find a forecast for {partnumber}
utter_confirm_part_number:
- text: Thanks you asked for forecast for {partnumber} did this help?
actions:
- utter_greet
- utter_cheer_up
- utter_did_that_help
- utter_happy
- utter_goodbye
- utter_iamabot
- utter_get_part_number
- utter_give_me_a_minute_while_i_check
- utter_confirm_part_number
nlu.md
## intent:greet
- hey
- hello
- hi
- good morning
- good evening
- hey there
## intent:goodbye
- bye
- goodbye
- see you around
- see you later
## intent:affirm
- yes
- indeed
- of course
- that sounds good
- correct
## intent:deny
- no
- never
- I don't think so
- don't like that
- no way
- not really
## intent:mood_great
- perfect
- very good
- great
- amazing
- wonderful
- I am feeling very good
- I am great
- I'm good
## intent:mood_unhappy
- sad
- very sad
- unhappy
- bad
- very bad
- awful
- terrible
- not very good
- extremely sad
- so sad
## intent:bot_challenge
- are you a bot?
- are you a human?
- am I talking to a bot?
- am I talking to a human?
## intent:get_supplier_forecast
- Give me a forecast
- Give me a part number forecast
- I want a forecast
- I want a part number forecast
- I want a forecast for a part
- I want a supplier forecast
- Forecast delivery date
- I need a part number delivery date
- I need an item delivery date
- When will i get a part delivered
stories.md
## happy path
* greet
- utter_greet
* mood_great
- utter_happy
## sad path 1
* greet
- utter_greet
* mood_unhappy
- utter_cheer_up
- utter_did_that_help
* affirm
- utter_happy
## sad path 2
* greet
- utter_greet
* mood_unhappy
- utter_cheer_up
- utter_did_that_help
* deny
- utter_goodbye
## say goodbye
* goodbye
- utter_goodbye
## bot challenge
* bot_challenge
- utter_iamabot
## give me a forecast
* get_supplier_forecast{"partnumber":"J12345-001"}
- slot {"partnumber":"J12345-001"}
- utter_get_part_number
- utter_confirm_part_number

Answer 1

Domain file remain as the same. Try below things.
Story file:
## give me a forecast path1
* get_supplier_forecast{"partnumber":null}
- slot {"partnumber":null}
- utter_get_part_number
## give me a forecast path2
* get_supplier_forecast{"partnumber":"J12345-001"}
- slot {"partnumber":"J12345-001"}
- utter_confirm_part_number
Include this NLU file:
## intent:get_supplier_forecast
#this is how to mention slots in nlu file
- ['J12345-001'](partnumber)
Note: I don't know what is "partnumber" in your case. If there is so many of them you might wanna use "lookup tables".
From above changes first if the slot is null utter_get_part_number will trigger and if the slot is filled with a value utter_confirm_part_number will trigger
If this doesn't fulfill your need or doesn't work as expected, you can try rasa interactive training. Just run rasa interactive on CMD or try rasa x interactive talk. From this you can choose what you expect from the bot