Hi there, my name is Ben and I would like to throw a surprise party for my friend Alexis.  He just got his engineering degree.  Can you help me?
At what venue would you like to have your party organised?
West Bay 
On what day would you like your party organised?
thursday
When would you like your party to kick off?
3 pm
How many people would you like to invite?
How has your day been
Fine so far. How many people would you like to invite?
I just learnt that on Thursday Alexis will be away. I'll have to reschedule
On what day would you like your party organised?
friday
How many people would you like to invite?
have you been to west bay?
I am sorry, I don't quite understand what you mean. I am only able to help you organise a party.
75 guests
I am sorry, but your booking request failed. Would you like to try a different time or day?
try saturday 7pm
OK, the West Bay Venue would be happy to accommodate you on Saturday @ 7 pm.
Can I book it for you now?
yes
Great, your party has been successfully booked at the West Bay Venue on Saturday at 7 pm!