Need help with python:

We need to inform the user of our navigation system that we need from them a start and ending point for their trip. Print an informative sentence that lets the user know that we need them to input two cities (start_city, target_city). Their available options should be: Atlanta, Baltimore, Boston, Charlotte, Dallas, Denver, Jacksonville, Minneapolis, Orlando, Sacramento, Tampa and Washington (let the user know this!).

Ask the input start_city and target_city for your trip and make a list cities_list with all the names of the possible cities the traveler can go from/to. Check if the input start and target cities are among the cities the traveler is allowed to travel to/from. If not, print an error statement that asks them to input another, appropriate city.