I am needing help with your train schedules. 
What is your planned itinerary? 
I will be departing from Birmingham New Street and arriving in Cambridge on Sunday at 18:45. 
What time do you want to leave by?
I would like to leave no later than 19:30.
There are no trains that match your criteria. Can you verify the time you want to leave?
I do not care what time it is leaving but check again for it arriving by 18:45.
The closest train i have leaves on sunday at 15:40 and arrives by 18:23. Would you like me to book you a ticket?
Yes please, and then I need to find a restaurant.  
Your ticket is booked. Reference number YWNA32TE. What kind of restaurant are you looking for?
I would like a chinese place.
In what area of town?
The centre please!
charlie chan is very popular. Would you like to make a booking?
No thank you that will be all
Thank you for contacting the Cambridge TownInfo centre. Goodbye