Hi, Anthony Mitchell here.
Hello, how may I aid you?
Please help me in booking flight ticket on dates  05/07 and 05/09.
Sure, what are your source and destination airport? Sure, what are your source and destination airport?
  My source and destination codes are New York, NY-LGA and Chicago, IL-ORD.
Please wait for a moment.
Ok.
I am sorry to inform you that we don't have any flight on these dates.
Ok, thank you for the response.
Thank you for opting us. Have a nice day.