You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jonathan Lee. I am planning to take my children to New York to visit Central Park.

ASSISTANT: May I know your boarding and landing points?

USER: Boarding point is New York, JFK and landing at New York, LGA.

ASSISTANT: Ok, help me with your journey dates?

USER: I want to travel on 01/18 and return on 01/20.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry no flights are available on your travel dates.

USER: Ok, not a problem. Thank you for your response.

ASSISTANT:  Thank you for reaching us.