I am planning a trip to Cambridge
I am definitely assist with planning that trip.  Do you want to start with booking a train, or search a restaurant?
Let's book a train, I'll be departing from cambridge and going to broxbourne. Lets look for something on wednesday arriving in broxbourne by 19:00.
It seems there are thirteen trains to Broxbourne arriving by 19:00. What time would you like to leave?
We're not picky, please book any train arriving in Broxbourne by 19:00 for 4 people. 
Okay, your booking was successful. Your total fee of 71.59 GBP is payable at the station. The reference number is B5E7R2LE.
Thanks! Now I need to find a Lebanese restaurant in the expensive price range. Can you help me find one?
I'm afraid there isn't an expensive Lebanese restaurant in the city.
Is there any in the East?
Unfortunately, the only Lebanese restaurant in town is moderately-priced. Would you like to book that restaurant or should I search for a different restaurant?
What about one that serves indian dood?
There are 4 indian restaurants in the east. Did you have a preference on price?
I'd like someplace expensive, please.
I have 2 that are expensive. May I suggest Sitar Tandoori? Would you like to book that?
Yes, I need a table for 4 people at 10:15 on Wednesday, if that day is not available then try Friday and provide the reference number.
Booking was successful. The table will be reserved for 15 minutes.
Reference number is : UYGNM1SV.
Thanks for all your help.  I think I'm good now.
You're welcome, have a great day!