Swiss-German is considerably different from German, especially as it happens in regards to those very phrases which a traveler needs: niceties, greetings, asking for stuff, getting directions, etc. One of the key differences to getting by with Swiss German. For example, "Fine, thank you" is Guet, merci; with guet being the German word for good/fine, while merci is from the French "thank you". In addition, there are many pronunciation differences which separate Swiss-German from either language. For example, the diphthong in Swiss-German "guet" versus the monophthong in High-German "gut".
Note that most of the following Swiss-German phrases and words are written as they would be pronounced by people living in the area around Bern, Basel, Zürich (i.e. in the canton of Bern, etc.). Whilst bernese dialect is widely understood in the Swiss-German part of Switzerland, it's by no means "official" Swiss-German (despite of the fact that Bern is the Swiss capital). There is no standardized Swiss-German ("Schwyzerdüütsch"). Remarkably, the native dialects spoken in the many Swiss-German cantons are clearly distinguishable by locals (i.e. they can tell apart from the dialect in which canton somebody grew up). Speaking Swiss-German is common for all people living in the Swiss-German part of Switzerland, independent of age or education. For writing, standard German is mostly used, though Swiss-German dialect is particularly popular among the youths (e.g. in e-mail messages, SMS messages etc.). With the ongoing globalization and immigration, mixing Swiss-German dialects with English (quite often even with pseudo English) or speaking so called "Jugo-Deutsch" (German pronounced as immigrants coming from the former Yugoslavia region tend to pronounce it) has also become trendy for youngsters.