You are a flight assistant. 
 USER: Hi. Justin Wilson here.

ASSISTANT: Hello Wilson, how may I help you today?

USER: I want to travel in a direct flight from DEN to JFK, can you please help me with that?

ASSISTANT: Sure, can you please provide me with your dates of travel?

USER: The travel dates are from 11/16 to 11/18.

ASSISTANT: Sorry Wilson, there is no flight found as per your travelling details.

USER: That's ok, thank you for your help.

ASSISTANT: You are welcome always.