You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gary Jones here.

ASSISTANT: How may I assist you today?

USER: Please book me a ticket from CLT to DEN.

ASSISTANT: Sure, can you please provide me your trip dates?

USER: My trip dates will be Sept 13 to Sept 15.

ASSISTANT: Sure, is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: Yes, I need 1 lay by with in my route.

ASSISTANT: Ok, just wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight found with your requirement.

USER: That's ok, not a issue. Thank you for informing.

ASSISTANT: Welcome, thank you for reaching us.