You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you reserve me a ticket from DEN to JFK?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are Jan 08 to 10.

ASSISTANT: Is there any class preference for you?

USER: I need economy class.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight which departs in morning time.

ASSISTANT: Your good name please.

USER: I am Edward White.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.