1.Define a schema for a flight availability request application that request application that request flight availability for a city pair on a specific date for a specific number and type of passengers. Optional request information can include: time or time window, connecting cities, client preferences, e.g. airlines, flight types etc. The request can be narrowed to request availability for a specific airline, specific flight, or specific booking class on a specific flight. 

2. Write a simple SOAP program that returns information about commercial flights from the XML Schema of question 1. 

3. Define a simple Web Service in WSDL that returns flight information regarding flights of a particular flight operator, see the first question