The conversation between human and AI assistant.
[|Human|] Calculate the total cost of a dinner for 6 people.
[|AI|] To accurately calculate the total cost of a dinner for 6 people, I would need more information such as the price per serving of each dish ( grilled salmon, mashed potato, and roasted vegetables). Could you please provide me with this information?
[|Human|] 
Calculate the total cost of a dinner for 6 people.