Merge multiple stories without using forms

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I have an intent as below which will fetch vaccination details from database. this intent requires to two slots(country, vaccine) to be filled, if no slots or at least one slot is filled, i am using different stories to ask user to fill the slots, then it will show vaccination details at last.

i am using rasa: 1.10.2 for this chatbot.

## intent:vaccination_details
- get vaccination details from [USA](country) for [Covishield](vaccine)
- show vaccination details
- show me [Covishield](vaccine) vaccination details in [USA](country)
- get vaccination details from [USA](country)
- show [Covishield](vaccine) vaccination details

i am using following stories to fill the slots, here action_select_vaccine,action_select_country custom actions which fetches list of available vaccines and country lists from database as buttons for user to select.

Since it requires only two slots to be filled from actions, i am not using RASA forms. Can we merge these stories into one or two without using forms?

## Story_1: vaccine,country not given
* vaccination_details
	- action_select_vaccine
* select_vaccine{"vaccine":"Covishield"}
	- slot{"vaccine":"Covishield"}
	- action_select_country
* select_country{"country":"USA"}
	- slot{"country":"USA"}
	- action_vaccination_details
	
## Story_2: country not given
* vaccination_details{"vaccine":"Covishield"}
	- slot{"vaccine":"Covishield"}
	- action_select_country
* select_country{"country":"USA"}
	- slot{"country":"USA"}
	- action_vaccination_details

## Story_3: vaccine not given
* vaccination_details{"country":"USA"}
	- slot{"country":"USA"}
	- action_select_vaccine
* select_vaccine{"vaccine":"Covishield"}
	- slot{"vaccine":"Covishield"}
	- action_vaccination_details
	
## Story_4: vaccine,country given
* vaccination_details{"country":"USA","vaccine":"Covishield"}
	- slot{"country":"USA"}
	- slot{"vaccine":"Covishield"}
	- action_vaccination_details