You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to travel from Denver, DEN to Atlanta, ATL. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you share your journey dates?

USER: My planned journey dates are Oct 21 and Oct 23.

ASSISTANT: Do you have any preferences?

USER: Yes, I need to book my ticket in economy class with connection limit-1.

ASSISTANT: May I know your name?

USER: Sure, my name is Thomas Lopez.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Not an issue with this one. Thank you for the information.

ASSISTANT: Thank you for reaching us.