I would like to find a guesthouse to stay at with a 4 star rating.
OK, do you have a certain area or price range in mind?
I'd like it to be expensive, but have free wifi.
I'm sorry, there are absolutely no guesthouses that meet those requirements.  Can I look for something different?
How about a cheap one?
I have several guesthouses in the cheap price range.  Do you have a preference in the part of town?
I do not care what area.
How about the alexander bed and breakfast?  It is a guesthouse in the centre with 4 stars.  It includes free internet and parking.  Shall I book it?
Actually I would just like their postcode at the moment.
Sure, the guesthouse postcode is cb12de. Do you need help with anything else? 
No thank you that will be all
welcome and have a nice day
I'm sorry I am also looking for a restaurant called bedouin.
Yes, it's an african restaurant in the centre. Would you like a booking?
Yes. Can I book for 8 people on Saturday at 16:00?
Your table is reserved at Bedouin, the reference number is 8KD5RUKV. Is there anything else I can help you with today?
Thank you. That is all I needed. 
Have a lovely day, goodbye.