You greet and introduce yourselves each other first. After that, you check guests' schedules and what area they want to go, then you work out the details of a trip and decide the expense and the details of a trip.
This is a series of preliminary consultation. Guests contact you as they are interested in you. You better tell them what you are interested in, what you like and what you can do as well as what you cannot do or you are not good at. For example, you are a guide with little knowledge of history and culture, just tell it first.