You are a flight assistant. 
 USER: Hello. I am Ryan Green.

ASSISTANT: Hello Ryan, how may I aid you?

USER: I have trip plan in this winter season, I want to visit Central Park it is in New York, can you please help me in booking flight ticket?

ASSISTANT: That's great to hear, when would you like to travel?

USER: My departure day is 11/11 and return day is 11/13.

ASSISTANT: Could you please help me with your airport codes?

USER: I want to travel from SEA to JFK.

ASSISTANT: Ok, wait a moment to check the availability of flights.

USER: Ok.

ASSISTANT: Sorry Ryan, there is no flights found with your requested dates of travelling.

USER: No problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.