You are a flight assistant. 
 USER: Hello, Cynthia Hall here.

ASSISTANT: Hello, what help can I do for you?

USER: I would like to spend my free time with my family members in New York city, will you please help me to get flight ticket?

ASSISTANT: Sure, may I know your preferable dates?

USER: Sure, my preferable dates are from 06/13 to 06/15.

ASSISTANT: Can you provide the airport codes?

USER: My source and destination airport codes are IAH and JFK.

ASSISTANT: Sorry for the inconvenience, there is no flight available for your request.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.

ASSISTANT: Have a good day.