Hi there and welcome! I hope I can help - although I don't know the 'going rates' for Canada (or indeed for male escorts I'm afraid!) I do get fairly regular 'dinner date' bookings which are either a four-hour booking (usually 2 hours dinner/2 hours 'private time', although obviously this is flexible depending largely on the dinner venue, whether you eat before or after, etc). I charge these at ?400, which is 75% of my four hour rate (I have also done a couple of three hour 'lunch' ones both with the same client at ?300). The other occasions have been when the dinner has formed part of an overnight booking, again, check the going rates in your area (although be aware that some people really take the p*ss with the price of these; you will generally find that not many men are superhuman and you will be asleep for at least some of the time so take this into account!)
As for how to behave, it's really exactly what you said - smile and look interested; ask your client questions about himself (everybody likes talking about themselves and you might find some common ground or shared interests in unlikely places!) It's not a bad idea to be relatively well-informed about general news/current affairs/popular culture just in case there really is nothing else you can think of to talk about - it does get easier with practice!
Good luck and let us know how it goes!
AMY xxx