You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jack Barker.

ASSISTANT: Ok.

USER: I am planning to travel from DFW to JFK. Can you help me out?

ASSISTANT: Sure, may I know the travelling dates?

USER: My travelling dates are 12/18 to 12/20.

ASSISTANT: Ok, please wait for a moment.

USER: Make sure my connection is 1 and price is 200. Ok.

ASSISTANT: Sorry  Jack, there are no flights found on your requirements. Thank you for approaching us.

USER: That's fine. Thank you for your help.

ASSISTANT: You are welcome.