Tell me about a time a shop assistant was really helpful, or really unhelpful.

A natural way to answer

I remember an assistant in a phone shop who really knew her stuff. She explained everything clearly without any pushy sales talk, and she didn't try to upsell me on things I didn't need. It made me trust the shop completely.

Key phrases to use

• went the extra mile — to make more effort than is expected to help someone“The waiter went the extra mile for us.”
• knew her stuff — knew a lot about a subject and was good at it“The mechanic really knew his stuff.”
• upsell — to persuade a customer to buy something more expensive or extra“They always try to upsell you an extended warranty.”
• set foot in — to go into a place at all“I'll never set foot in that shop again.”