text: #Exercise 1: Create a simple chat bot in terminal following these rules:
  #Firstly, use input ask name
  #Then print "Hello {0}, welcome to our service" with 0 is the value of name
  #Print current list refrigerator (if first time it is empty)
  #Print "We can do 2 options. 1) Add new food to refrigerator 2) remove food from refrigerator"
  #Use input to ask options
  #If user choose 1 use input ask new food
  #Print "Here is your refrigerator after adding new food"
  #Then print list refrigerator after add newfood
  #If user choose 2 print "Here is your current refrigerator"
  #Then print list refrigerator
  #Then use input to ask the index user want to remove
  #If this index is valid, print "Here is your refrigerator after removing food", then print list refrigerator
  #If not, print "The index you input must larger than {0} and smaller than {1}", then ask again until index is valid
  #After finishing print "Do you want to continue using chat bot (Y/N) ?"
  #Use input ask options (Y or N)
  #If N out terminal
  #If Y continue to ask again
  