You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself David Mitchell.

ASSISTANT: How can I assist you?

USER: I am planning a trip to New York with my family. Can you help me in booking a ticket from ORD to JFK?

ASSISTANT: Sure David, can I know the travel dates please?

USER: My preferred trip dates are 01/16 and 01/18.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: It's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for approaching us.