Do not use the slot values verbatim in the utterance:

Slot-Value: hotel-bookpeople: 2
Indirect Utterance: My wife and I are looking to stay the night

Slot-Value: hotel-parking: yes
Indirect Utterance: We are also driving there, so it'd be good to have a hotel where we can leave the car for the night.

Slot-Value: train-bookpeople: 6
Indirect Utterance: I'm booking a trip on behalf of myself and five other band members.

Slot-Value: attraction-area: center; attraction-type: museum
Indirect Utterance: We're thinking of checking out some history in downtown. 

Slot-Value: hotel-parking: no; train-leaveat: 1545
Indirect Utterance: I don't drive, so we're doing the whole trip by public transport. I wanna take a train close to 4 PM.

Slot-Value: restaurant-cuisine: japanese; restaurant-pricerange: moderate; restaurant-area: west;
Indirect Utterance: we wanna try some sushi places that are not too pricey. i've heard there are some good places west side

Slot-Value: hotel-internet: yes; hotel-pricerange: expensive
Indirect Utterance: