You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: I need a flight ticket from DEN to ORD to attend a workshop, can you book a ticket for me?

ASSISTANT: Ok, I am glad to help you with that. Can I know your planned trip dates?

USER: Thank you and my planned trip dates are in 17 Nov and return on 19 Nov.

ASSISTANT: May I know your good name?

USER: Sure, my name is Ruth Lopez.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight which will return back in the afternoon time.

ASSISTANT: May I know your connection limit?

USER: Which I have mentioned above.

ASSISTANT: Ok, wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there are no flights found based on your journey details.

USER: I am very disappointed with your service, thank you for your search and information.

ASSISTANT: Thank you for approaching us. Have a nice day.