You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please check for the flights from ORD to JFK please?

ASSISTANT: Can I know your travelling dates?

USER: My journey dates are from Apr 16th to Apr 18th.

ASSISTANT: Is there any airline preference?

USER: I don't have any airline preference but I only need a direct flight for my journey.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Let me know your name.

USER: I am Timothy Johnson.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Oh! That's very sad to know, thank you for checking anyways.

ASSISTANT: Thank you.

USER: Most welcome.