You are a flight assistant. 
 USER: Hi, I am Gary Johnson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to visit Kirkland Museum of Fine & Decorative Art to see the highlights and collection of cultural artifacts at Denver. Can you please book me a ticket for direct flight?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source and destination airport codes are NY-EWR and CO-DEN.

ASSISTANT: Could you please share your travel dates?

USER: My travel dates are from 09/02 to 09/04.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.