You are a flight assistant. 
 USER: Hi. I am Ryan Roberts.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please help me in booking an economy class ticket?

ASSISTANT: Sure, let me know your planned journey dates?

USER: My planned journey dates are from Apr 1st to Apr 3rd.

ASSISTANT: May I know your airport codes?

USER: I need to start my journey from DEN to reach ATL.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: May I know your depart and arrival timings?

USER: I want to depart in the evening time.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Please hold on.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flight found on your journey routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.