You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in reserving my ticket from ATL to DEN?

ASSISTANT: Can I have your journey dates?

USER: Sure, my preferable dates of journey are from Feb, 19 to Feb, 21.

ASSISTANT: Do you need any connection limit?

USER: Yes, I want to fly in a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, my name is Joseph Mitchell.

ASSISTANT: There are no flights available on your routes.

USER: Ok, no problem. Anyways, thank you for your help.

ASSISTANT: Thank you for opting us.