Update interface items based on values entered in text fields

Hi, community,

I'm trying to create a user imput interface, which has text fields as follows.

<Customer Info>
#1. Company name
#2. Industory
#3. Contact Person's Name
#4. Phone number

Update interface items based on values entered in text fields

I'd like to update "contact person's name" and "phone number" based on the value which entered in the "company name" and "industory" field.
All items are stored data store entity, customer.
Is there the best practice to fetch the date from data store entity to the interface field?

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