question: what are name and phone number of patients who had more than one appointment?
#1 return patients 
#2 return appointments of  #1 
#3 return number of  #2 for each  #1 
#4 return #1 where #3 is  higher than one 
#5 return name of  #4 
#6 return phone number of  #4 
#7 return #5 ,  #6