In the realm of software development, customer interactions provide invaluable insights driving program creation. Consider a dialogue between a customer and a shopkeeper:

Customer: What are you selling?
Shopkeeper: Shawarma.
Shopkeeper: How much quantity do you want?
Customer: 2.
Customer: What is the price?
Shopkeeper: Rs 120.
Shopkeeper: Do you need a receipt?
Customer: Yes.

From this exchange, a system analyst discerns crucial variables: productName (shawarma),
quantity (2),
price (Rs 120), 
total.
Utilizing this data, the analyst formulates a pseudocode:

1. Set productName = “Shawarma”.
2. Prompt user for quantity.
3. Set pricePerUnit = Rs 120.
4. Calculate total = quantity * pricePerUnit.
5.  print invoice with productName, quantity, pricePerUnit, and total.

Converting pseudocode to program code, the analyst crafts an efficient system that generates accurate invoices based on customer interactions. Thus, customer-business dialogue fuels the development of programs tailored to user needs.