You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in booking the flight ticket from ORD to DEN?

ASSISTANT: Sure, I will  help you with that. Can you please provide your preferable dates of travelling?

USER: My travel dates are Aug 31 and Sept 2.

ASSISTANT: May I know your name to book the flight ticket?

USER: Kathleen Smith.

ASSISTANT: Any connection limit do you have?

USER: I need a single connection flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to return in the evening.

ASSISTANT: Any other specifications do you have?

USER: No.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching to our services, hope you have a great day.