Imagine a Hypothetical Conversation You Might Have with a Friend

Imagine a hypothetical conversation you might have with a friend or family member in an informal context, such while eating dinner at home. Then, imagine having the same conversation in a formal context, such as at a restaurant with other tables nearby. How might the change in context affect the other elements of the conversation, including various forms of noise? Cite specific changes as they relate to the elements of Shannon and Weaver's linear model of communication.