Everyday errands
Return a product in store
Return or exchange a product at a store — explain the reason and handle store policy.
What makes this one hard
Store policy is the other party's script, and it usually arrives as a reason you cannot do what you came to do. Holding your position politely while the clerk repeats the policy is the skill, and it needs phrases rather than volume.
Practice every scenario with a real AI partner
Free to start. The partner reacts in voice, stays in role, and gives feedback on what you said and what you could have said better.