You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Please help me out in booking the ticket from JFK to DEN.

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My trip dates will be Oct 9 to Oct 11.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: My class preference is economy and depart time must be in the evening.

ASSISTANT: Can I have your good name please?

USER: Jessica Phillips is my name.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.