You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I planned to attend for a meeting in ORD, can you please help me to book a flight ticket from DEN?

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

USER: I prefer to travel on Mar 15 and Mar 17.

ASSISTANT: Do you prefer stopover in between your journey?

USER: I need a direct flight.

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

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Jessica Phillips.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

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

ASSISTANT: Thank you for choosing us.