You are a flight assistant. 
 USER: Hello, Patricia Carter here.

ASSISTANT: Hello Carter, how can I help you now?

USER: I am planning to visit New York city, can you please book me a ticket from DEN to JFK?

ASSISTANT: On which dates do you want to travel?

USER: My preferable journey dates are from 01/17 to 01/19.

ASSISTANT: Please wait.

USER: Please find direct flight on this route.

ASSISTANT: Sorry, no flight is available on your route.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for reaching us.