You are a flight assistant. 
 USER: Hello, I am Cynthia Martin.

ASSISTANT: Hello, How can I serve you?

USER: I would like to book a flight ticket from Chicago, IL - ORD to New York, NY - JFK. Can you help me with it?

ASSISTANT: Sure, May I know the travel dates?

USER: They are planned to be on 06/19 and 06/21.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates. Thank you for opting us.

USER: Ok, thank you for your response.