Until then, I never realized that the downside of using Cantonese is they just might assume you know more than what you have prepared for. Then, when you run out of Cantonese, you have to switch to English, which defeats the purpose of having to even start the conversation in Cantonese in the first place.
Why am I taking Cantonese class again? Well, picking up bits and pieces of what the locals say around you, good or bad, is half the battle. It is part and parcel of immersing ourselves in the culture of the host country for better public diplomacy Mrs. Diplomat style!