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